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Where is the fallacy here?
“Change” last forever? If not what fallacy breaks the chain of reasoning shown here?What is the fallacy where you completely discredit someone because of a single mistake?Does the Fallacy Fallacy make logic useless?Rhetorical fallacy to fill lack of scientific evidence with superstitionWhat are the arguments for and against “one true arithmetic”?Alternate form of “all x are y”What is, and isn't the appeal to emotion logical fallacy?The Euthyphro Dilemma (complete philosophy newbie here)Universe as a container; Critique of the Kalam Cosmological Argument?What fallacy is assuming something is the case because of past events
Where is the fallacy here:
whatever is natural is not unnatural
whatever is unnatural is not natural
the phenomenon of cats being born into this world is natural
the phenomenon of rabbits being born into this world is not the phenomenon in point 3
Conclusion: the phenomenon of rabbits being born into this world is unnatural
logic
asked 6 hours ago
brilliantbrilliant
1234
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add a comment |
Where is the fallacy here:
whatever is natural is not unnatural
whatever is unnatural is not natural
the phenomenon of cats being born into this world is natural
the phenomenon of rabbits being born into this world is not the phenomenon in point 3
Conclusion: the phenomenon of rabbits being born into this world is unnatural
logic
asked 6 hours ago
brilliantbrilliant
1234
New contributor
brilliant is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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2
Obviously not all cats are normal.
– Bread
6 hours ago
1
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
1
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago
add a comment |
Where is the fallacy here:
whatever is natural is not unnatural
whatever is unnatural is not natural
the phenomenon of cats being born into this world is natural
the phenomenon of rabbits being born into this world is not the phenomenon in point 3
Conclusion: the phenomenon of rabbits being born into this world is unnatural
logic
asked 6 hours ago
brilliantbrilliant
1234
New contributor
brilliant is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Where is the fallacy here:
whatever is natural is not unnatural
whatever is unnatural is not natural
the phenomenon of cats being born into this world is natural
the phenomenon of rabbits being born into this world is not the phenomenon in point 3
Conclusion: the phenomenon of rabbits being born into this world is unnatural
logic
logic
asked 6 hours ago
brilliantbrilliant
1234
New contributor
brilliant is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 6 hours ago
brilliantbrilliant
1234
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edited 4 hours ago
brilliant
asked 6 hours ago
brilliantbrilliant
1234
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asked 6 hours ago
brilliantbrilliant
1234
asked 6 hours ago
brilliantbrilliant
1234
1234
New contributor
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New contributor
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2
Obviously not all cats are normal.
– Bread
6 hours ago
1
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
1
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago
add a comment |
2
Obviously not all cats are normal.
– Bread
6 hours ago
1
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
1
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago
2
2
Obviously not all cats are normal.
– Bread
6 hours ago
Obviously not all cats are normal.
– Bread
6 hours ago
1
1
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
1
1
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago
add a comment |
4 Answers
4
active
oldest
votes
Here is the argument:
No N is not-N.
No not-N is N.
All C are N.
No R are C.
Thus: No R are N.
The syllogism is invalid for two reasons. First, the third premise denies the antecedent (cats) of the fourth. There can be other animals that are normal. Wikipedia: Denying the antecedent; Formal fallacy.
Second, a term that is distributed in the conclusion (normal) is not distributed in the major premise (all cats are normal). Wikipedia: Illicit major.
The first two premises are not needed except as definitions. The second two, about cats and rabbits, state actual relationships between categories,
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
add a comment |
The argument is basically the fallacy of Denying the Antecedant. ~C, C → N |- ~N
- RabbitBirths are not CatBirths,
- CatBirths are NaturalPhenomena,
- therefore RabbitBirths are not NaturalPhenomena.
R → ~C , C → N |- R → ~N
answered 4 hours ago
Graham KempGraham Kemp
87618
add a comment |
You imply in point 3 that all cats are normal. I don't know the specific name of the fallacy, but your argument is invalid because you didn't state that all things normal are cats, only that all cats are normal.
answered 5 hours ago
Jonah.PJonah.P
112
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I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
add a comment |
Your error here is defining "normal" as a single set of things to which something either belongs or doesn't. That's not a useful (or normal) definition. Things are only normal or abnormal in context, compared to others of their kind. Are they a common or typical example of that kind, or are they an unusual or rare example? Normal cats have long tails (Manx cats might be considered abnormal). But a cat would be, say, a very abnormal voter, or an abnormal vehicle (more typical voters being human and more typical vehicles being machines). A perfectly normal person, likewise, would be an abnormal meal (cannibalism being rare), and a perfectly ordinary vehicle (say a bicycle) would be an unusual piece of art to hang on a wall.
You then make a second error in assuming that the statement "cats are normal" is equating the set of cats with the set of normal things. That's not what "are" means in this context. A more appropriate reading of that sentence would be to make cats a subset of normal things.
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here is the argument:
No N is not-N.
No not-N is N.
All C are N.
No R are C.
Thus: No R are N.
The syllogism is invalid for two reasons. First, the third premise denies the antecedent (cats) of the fourth. There can be other animals that are normal. Wikipedia: Denying the antecedent; Formal fallacy.
Second, a term that is distributed in the conclusion (normal) is not distributed in the major premise (all cats are normal). Wikipedia: Illicit major.
The first two premises are not needed except as definitions. The second two, about cats and rabbits, state actual relationships between categories,
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
add a comment |
Here is the argument:
No N is not-N.
No not-N is N.
All C are N.
No R are C.
Thus: No R are N.
The syllogism is invalid for two reasons. First, the third premise denies the antecedent (cats) of the fourth. There can be other animals that are normal. Wikipedia: Denying the antecedent; Formal fallacy.
Second, a term that is distributed in the conclusion (normal) is not distributed in the major premise (all cats are normal). Wikipedia: Illicit major.
The first two premises are not needed except as definitions. The second two, about cats and rabbits, state actual relationships between categories,
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
add a comment |
Here is the argument:
No N is not-N.
No not-N is N.
All C are N.
No R are C.
Thus: No R are N.
The syllogism is invalid for two reasons. First, the third premise denies the antecedent (cats) of the fourth. There can be other animals that are normal. Wikipedia: Denying the antecedent; Formal fallacy.
Second, a term that is distributed in the conclusion (normal) is not distributed in the major premise (all cats are normal). Wikipedia: Illicit major.
The first two premises are not needed except as definitions. The second two, about cats and rabbits, state actual relationships between categories,
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
Here is the argument:
No N is not-N.
No not-N is N.
All C are N.
No R are C.
Thus: No R are N.
The syllogism is invalid for two reasons. First, the third premise denies the antecedent (cats) of the fourth. There can be other animals that are normal. Wikipedia: Denying the antecedent; Formal fallacy.
Second, a term that is distributed in the conclusion (normal) is not distributed in the major premise (all cats are normal). Wikipedia: Illicit major.
The first two premises are not needed except as definitions. The second two, about cats and rabbits, state actual relationships between categories,
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
answered 4 hours ago
Mark AndrewsMark Andrews
2,7951623
2,7951623
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
add a comment |
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
Thank you. I guess your answer is fully applicable to the latest edits in my question, too, right?
– brilliant
4 hours ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
@brilliant Yes. See my comment to your original question.
– Mark Andrews
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
Seems like in addition to denying the antecedent, it's a form of equivocating as it makes use of the ambiguous mean of "is". Where in the first 2 statements it uses "is" to mean "has the property of". And then in 3, 4, and the conclusions tries to use that same "is" in the sense of equality.
– Shufflepants
1 hour ago
add a comment |
The argument is basically the fallacy of Denying the Antecedant. ~C, C → N |- ~N
- RabbitBirths are not CatBirths,
- CatBirths are NaturalPhenomena,
- therefore RabbitBirths are not NaturalPhenomena.
R → ~C , C → N |- R → ~N
answered 4 hours ago
Graham KempGraham Kemp
87618
add a comment |
The argument is basically the fallacy of Denying the Antecedant. ~C, C → N |- ~N
- RabbitBirths are not CatBirths,
- CatBirths are NaturalPhenomena,
- therefore RabbitBirths are not NaturalPhenomena.
R → ~C , C → N |- R → ~N
answered 4 hours ago
Graham KempGraham Kemp
87618
add a comment |
The argument is basically the fallacy of Denying the Antecedant. ~C, C → N |- ~N
- RabbitBirths are not CatBirths,
- CatBirths are NaturalPhenomena,
- therefore RabbitBirths are not NaturalPhenomena.
R → ~C , C → N |- R → ~N
answered 4 hours ago
Graham KempGraham Kemp
87618
The argument is basically the fallacy of Denying the Antecedant. ~C, C → N |- ~N
- RabbitBirths are not CatBirths,
- CatBirths are NaturalPhenomena,
- therefore RabbitBirths are not NaturalPhenomena.
R → ~C , C → N |- R → ~N
answered 4 hours ago
Graham KempGraham Kemp
87618
answered 4 hours ago
Graham KempGraham Kemp
87618
answered 4 hours ago
Graham KempGraham Kemp
87618
answered 4 hours ago
Graham KempGraham Kemp
87618
87618
add a comment |
add a comment |
You imply in point 3 that all cats are normal. I don't know the specific name of the fallacy, but your argument is invalid because you didn't state that all things normal are cats, only that all cats are normal.
answered 5 hours ago
Jonah.PJonah.P
112
New contributor
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
add a comment |
You imply in point 3 that all cats are normal. I don't know the specific name of the fallacy, but your argument is invalid because you didn't state that all things normal are cats, only that all cats are normal.
answered 5 hours ago
Jonah.PJonah.P
112
New contributor
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
add a comment |
You imply in point 3 that all cats are normal. I don't know the specific name of the fallacy, but your argument is invalid because you didn't state that all things normal are cats, only that all cats are normal.
answered 5 hours ago
Jonah.PJonah.P
112
New contributor
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You imply in point 3 that all cats are normal. I don't know the specific name of the fallacy, but your argument is invalid because you didn't state that all things normal are cats, only that all cats are normal.
answered 5 hours ago
Jonah.PJonah.P
112
New contributor
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 5 hours ago
Jonah.PJonah.P
112
New contributor
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Check out our Code of Conduct.
answered 5 hours ago
Jonah.PJonah.P
112
answered 5 hours ago
Jonah.PJonah.P
112
112
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New contributor
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Jonah.P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
add a comment |
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
I am not sure that point 3 is "all" cats are normal or "some" cats are normal.
– Frank Hubeny
5 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
By "cats are normal" I meant to say that it is absolutely normal that cats are born into and exist in this world, whatever condition some cats may be born in (blind, no limbs, etc.)
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
add a comment |
Your error here is defining "normal" as a single set of things to which something either belongs or doesn't. That's not a useful (or normal) definition. Things are only normal or abnormal in context, compared to others of their kind. Are they a common or typical example of that kind, or are they an unusual or rare example? Normal cats have long tails (Manx cats might be considered abnormal). But a cat would be, say, a very abnormal voter, or an abnormal vehicle (more typical voters being human and more typical vehicles being machines). A perfectly normal person, likewise, would be an abnormal meal (cannibalism being rare), and a perfectly ordinary vehicle (say a bicycle) would be an unusual piece of art to hang on a wall.
You then make a second error in assuming that the statement "cats are normal" is equating the set of cats with the set of normal things. That's not what "are" means in this context. A more appropriate reading of that sentence would be to make cats a subset of normal things.
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
add a comment |
Your error here is defining "normal" as a single set of things to which something either belongs or doesn't. That's not a useful (or normal) definition. Things are only normal or abnormal in context, compared to others of their kind. Are they a common or typical example of that kind, or are they an unusual or rare example? Normal cats have long tails (Manx cats might be considered abnormal). But a cat would be, say, a very abnormal voter, or an abnormal vehicle (more typical voters being human and more typical vehicles being machines). A perfectly normal person, likewise, would be an abnormal meal (cannibalism being rare), and a perfectly ordinary vehicle (say a bicycle) would be an unusual piece of art to hang on a wall.
You then make a second error in assuming that the statement "cats are normal" is equating the set of cats with the set of normal things. That's not what "are" means in this context. A more appropriate reading of that sentence would be to make cats a subset of normal things.
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
add a comment |
Your error here is defining "normal" as a single set of things to which something either belongs or doesn't. That's not a useful (or normal) definition. Things are only normal or abnormal in context, compared to others of their kind. Are they a common or typical example of that kind, or are they an unusual or rare example? Normal cats have long tails (Manx cats might be considered abnormal). But a cat would be, say, a very abnormal voter, or an abnormal vehicle (more typical voters being human and more typical vehicles being machines). A perfectly normal person, likewise, would be an abnormal meal (cannibalism being rare), and a perfectly ordinary vehicle (say a bicycle) would be an unusual piece of art to hang on a wall.
You then make a second error in assuming that the statement "cats are normal" is equating the set of cats with the set of normal things. That's not what "are" means in this context. A more appropriate reading of that sentence would be to make cats a subset of normal things.
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
Your error here is defining "normal" as a single set of things to which something either belongs or doesn't. That's not a useful (or normal) definition. Things are only normal or abnormal in context, compared to others of their kind. Are they a common or typical example of that kind, or are they an unusual or rare example? Normal cats have long tails (Manx cats might be considered abnormal). But a cat would be, say, a very abnormal voter, or an abnormal vehicle (more typical voters being human and more typical vehicles being machines). A perfectly normal person, likewise, would be an abnormal meal (cannibalism being rare), and a perfectly ordinary vehicle (say a bicycle) would be an unusual piece of art to hang on a wall.
You then make a second error in assuming that the statement "cats are normal" is equating the set of cats with the set of normal things. That's not what "are" means in this context. A more appropriate reading of that sentence would be to make cats a subset of normal things.
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
answered 5 hours ago
Lee Daniel CrockerLee Daniel Crocker
1,534512
1,534512
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
add a comment |
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
I did some editing to my question.
– brilliant
4 hours ago
I did some editing to my question.
– brilliant
4 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
Your edited question only makes the second error--assuming that "is" means equivalence and not subset. "Cats are carnivores", for example, clearly means that cats are a subset of carnivores, not an identical set.
– Lee Daniel Crocker
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
This is the same error, not the second one.
– brilliant
3 hours ago
add a comment |
brilliant is a new contributor. Be nice, and check out our Code of Conduct.
brilliant is a new contributor. Be nice, and check out our Code of Conduct.
brilliant is a new contributor. Be nice, and check out our Code of Conduct.
brilliant is a new contributor. Be nice, and check out our Code of Conduct.
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2
Obviously not all cats are normal.
– Bread
6 hours ago
1
Assuming cats are normal: rabbits can also be normal without being cats.
– Bread
4 hours ago
@Bread - I did some edits.
– brilliant
4 hours ago
@brilliant My answer responds to your original post. I do not think that the edits change my answer.
– Mark Andrews
4 hours ago
1
It is classically known as 'affirming the consequent'. It involves following an implication backward, or negating both sides of an implication and assuming the result is true. (The former form is 'arguing from the converse', this is the the second form 'arguing from the inverse'.) Even though "an A is an X" implies "any property P of an X is also that of an A', it does not mean that "an A is not an X" implies "any property P of X is not that of an A". Negation does not carry over that way.
– jobermark
3 hours ago