Imprecision fallacy

An imprecision fallacy (also an error in sampling) occurs when evidence used is not representative of the group because it is imprecise in some way.

Cogito ergo sum Logic and rhetoric

Key articles

Logical fallacy Syllogism Argument

General logic

Anecdotal evidence Axiom Evil is the absence of God Fallacy of opposition Nutpicking Preaching to the choir

Bad logic

Canard Exception that proves the rule Masked man fallacy Non sequitur Overgeneralization Word magic v - t - e

For example, in an apex fallacy, only the cream of the crop are considered when generalizing all members of a group; clearly, the top performers are not representative of the group at large, and thus cannot be generalized.

It is an informal fallacy.