This question already has an answer here:
There are dozens of different types of fallacies: formal fallacies, informal fallacies, faulty generalizations, red herring fallacies, and so on...
But is there one simple, singular condition that all of these meet that makes them eligible for such a classification?
Such as If x is y, then x is a logical fallacy.
Where x is the proposition and y is the condition that it meets.