I think some of the people contributing to this node have lost sight of what it really means. If you constantly question every choice you make then you will be forced to make educated, logical, thought out decisions. If you question your excuses, then you must prove that your excuse is valid. This way you never let yourself get away with the temptations offered by ignorance, cowardice, and rage.
Assumptions are dangerous. Attacking someones assumptions on any subject creates an environment in which the evolution of thought is an easier task. By making sure the foundations of an idea are solid before fully discussing it, you save time and free up your mind for other brain bending activities or other leisures.
"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear." - Thomas Jefferson