Into the Night
Verified User
That is not very accurate.
A logical fallacy violates syllogistic structure. Aristotle defined the fallacies as sophistry that can be disproven through the logic of syllogism.
A simple syllogism is
a=b
b=c
therefore c must equal a
A simple fallacy would be
a=b
c=d
therefore c must equal a
Logically, this fails. C might equal a - but nothing in the syllogism proves this. That fallacy is in the declarative - c MUST equal a - that is false.
A fallacy is an error in logic. Any error in logic.
This particular example is known as an undistributed middle fallacy, and is a formal fallacy. Like all fallacies, it is an invalid argument.