Why do there exist "logical fallacies" that are not really consistent logical fallacies?
By logical fallacy, consider e.g. ad hominem.
By consistent logical fallacy I refer to a type of logical fallacy. Logical fallacies are "reasoning", which is thought to be improper, because it doesn't follow "consistency" in the argumentation context. Ad hominem can be thought to be a logical fallacy, because it's claimed to "refer to things that are not related to the context in hand". However, what or who decides, what's the "correct context in hand"? Can't this be pretty subjective? Thus it should be impossible to refer to "correct context" in a scientific way and thus ad hominem is not a consistent logical fallacy.
A consistent logical fallacy is such, which can be unambiguously interpreted to exist "the same way", every time it's claimed to exist. But recognizing logical fallacies should be difficult on its own, because of the difficulty of deciding "what's the correct current context of discourse". It's possible for people to manipulate it as well, simply "lie" about the context. Then what's the purpose of logical fallacies that are non-consistent? Since they ought to be perceived to have no consistency and are thus considerable as unscientific (not suitable for scientific practice).
Are there examples of consistent logical fallacies?
Some of the biases listed in e.g. this paper:
can be thought to have "significant" empirical backing. Could they be thought as scientific logical fallacies then? Because they have bio-psychological support. Still they may not be consistent by default, but rather through observation. However, the point is, these are based on "harder measures", rather than something like ad hominem, which seems almost as naive as "whether you like this person or not". Which should be, a matter of taste, for independent adult people. In a similar way as "whether I like this music or not". Implying "you don't like this person" a logical fallacy is absurd. It's like suggesting that "your musical taste is wrong".