Circular Generalization Fallacy

Whenever a logical fallacy is committed, the fallacy has its roots in Agrippa's trilemma which is simply the fact that the foundation of all human thought (without Divine revelation) is based on one of three unhappy possibilities. These three possibilities are infinite regression, circular reasoning, or bare assertions without any evidence. Circular Generalization, a form of circular reasoning, is one of these three unhappy possibilities.

The Circular Generalization Fallacy occurs when an exception to a conclusion (which would normally mean that the conclusion was not true) is claimed to be compatible with the conclusion and even proof of it. Generally, this involves a just-so story, which is an ad hoc hypothesis to explain away the contradictory evidence. The real problem is when the contradiction is then used as proof for the conclusion with which is conflicts.

Examples of the Circular Generalization Fallacy

The Inflation story is an ad hoc hypothesis designed to rescue the Big Bang, and then is sometimes used as proof for the Big Bang, but it's just a story.

The Dark Matter-Dark Energy story is an ad hoc hypothesis designed to rescue the Big Bang, and then is sometimes used as proof for the Big Bang, but it's just a story.