Inconsistency

When anindividual attempts to avoid being associated with an unpleasant act by claiming that no true member of their group would do such an unpleasant act.

No true Scotsman

The fallacy when someone presents information then contradicts their previous argument or defeats it.

Ex. I never said most of the things I said.

Ex. Philip puts sugar in his porridge. No True Scotsman would do that therefore, Philip is not a true Scotsman.