"“Great scientists tolerate ambiguity very well,” Hamming says. “They believe the theory enough to go ahead; [but] they doubt it enough to notice the errors and faults so they can step forward and create the new replacement theory.” This is perhaps the most important advice from among Hamming’s many suggestions. The path to excellence requires this balance between confidence and doubt, and though this balance is challenging, it’s tractable so long as your recognize what you’re facing. " - Fred Yankowski