a) anything suggested contradicts everything perceivable, because shaping a suggestion tempts one to ignore the perceivable origin; within which one shapes suggestions.

b) perceivable (inception towards death) generates perceiving (life) through "forward" motion...no conflict. Ignoring perceivable (need) for suggested (want) tempts one into a want vs not want conflict of reason.

In short...perceivable FOR perceiving, or perceiving CONTRA perceiving over suggested.