the mind > mental capacity > knowledge > conformity with what is known, truth > disregard for truth, falsehood > lack of truth, falsity > an error, mistake > [adjective] > making or characterized by blunders (5)
Having the nature of a ‘bull’ or grotesque blunder; laughably erroneous.
Making or characterized by gross mistakes.
Of the nature of, or tending to, blunders.
Stupid, foolish; dunderheaded; blundering.