Argumentum ad logicam

from Wikipedia, the free encyclopedia

The argument ad logicam is a logical fallacy . A conclusion must be wrong because a previous argument was wrong. Other terms are error from error, refutation by error or bad reason fallacy.

Examples

In the examples, the argument ad logicam is italicized.

Tom : All animals are cats. Felix is ​​an animal. That's why Felix is ​​a cat.
Bill : Not all animals are cats. You're wrong, so Felix can't be a cat .

or

Tom : I speak German. So I have to be German.
Bill : Austrians also speak German. Your reasoning is wrong so you are not German .

Rejection of a fallacy

Conversely, the wrong reasoning must not be taken to be correct just because the claim turns out to be true.

Tom : All animals are cats. Felix is ​​an animal. That's why Felix is ​​a cat.
Bill : Not all animals are cats. You're wrong, Felix doesn't have to be a cat.
The cat Felix enters the room.
Tom : I was correct, so my reasoning is correct.

corresponding

Tom : I speak German. So I have to be German.
Bill : Austrians also speak German. So you don't have to be German.
Tom : But I'm actually German. So everyone who speaks German is very much German.

See also

Individual evidence

  1. ^ C. Glaser: Argumentum ad logicam. In: Risk in Management. Springer Gabler, Wiesbaden 2019, p. 194.