#5, this concept of general skepticism and confirming your own facts was echoed -- I don't know if it was conscious -- by Thomas Jefferson in this famous quote:
Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. 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 blindfolded fear.
The quote comes from a letter Jefferson wrote to his nephew giving general life-lessons and advice. The advice seems very similar, saying that you cannot know anything unless you take the time to research it and make your own decisions; don't let biased opinion influence you.