Most ignorances are vincible, and in the greater number of cases stupidity is what the Buddha pronounced it to be, a sin. For, consciously, or subconsciously, it is with deliberation that we do not know or fail to understand-because incomprehension allows us, with a good conscience, to evade unpleasant obligations and responsibilities, because ignorance is the best excuse for going on doing what one likes, but ought not, to do.