How to really know something.............

Ryan Holiday offers the unwelcomed answer (his post includes a
quote from blog favorite Richard Feynman).  Full post here.
Excerpt here:
"That comes from rigor and discipline. From humility and understatement. It comes practices, checklists, from methods, and the scientific method. It comes from staying up late reading, not blogging. It comes from having deep connections with a handful of smart people who push you to be better, not networking. It comes from separating ideas from your identity—so you can pick up, discard, pick up, rearrange, discard and pick them up at whim."