Richard Feynman, noted Nobel laureate and ultimate critical thinker on the Rogers Commission investigating the Challenger space shuttle accident,
“… if you’re doing an experiment, you should report everything that you think might make it invalid — not only what you think is right about it; other causes that could possibly explain your results; and things you thought of that you’ve eliminated by some other experiment, and how they worked — to make sure the other fellow can tell they have been eliminated.” – Richard Feynman, 1974
At the time of his death in 1988, two notes were still on his blackboard (Hawking, 2001):
What I can not create I can not understand.
Know how to solve every problem that has been solved