Belief bias

What it is

Judging the strength of an argument by whether its conclusion seems believable rather than by whether the logic is valid.

Example Accepting a flawed argument because you like where it ends.

Confirmation bias bias
Both let existing beliefs steer judgment: confirmation bias in what we search for, belief bias in how we judge arguments.
Motivated reasoning bias
Accepting weak arguments for pleasing conclusions is the argument-judging side of motivated reasoning.
Circular reasoning fallacy
A circular argument slips by when we like its conclusion, which is belief bias.
Fallacy fallacy fallacy
Dismissing a conclusion because of a bad argument is the reverse of accepting a bad argument because we like the conclusion.
Denying the antecedent fallacy
We tend to accept an invalid form when its conclusion is believable.
Undistributed middle fallacy
Invalid syllogisms feel valid when the conclusion fits what we believe.
Wason selection task bias
People judge logical validity by whether they like the conclusion, which obscures structural errors.