[nearmuse]

> Think before you speak, think before you act.

People always did, especially the smart ones like Stallman. His blog literally consists of his provocative takes on various issues. Thinking results in having an argumentation for one's actions. That argumentation might be wrong, and the person could change their views when presented with evidence. If you never overlook blunders and allow to self-correct, you are discouraging original thinking.