With respect, the first half of the sentence sounds more like waffling than a clear warning to your peers. I bond with other engineers over how badly the industry as a whole handles the scientific method. Too many of us can’t test a thesis to the satisfaction of others. Hunches, speculation, and confidently incorrect. Every goddamn day.

Feynman said: The most important thing is not to fool yourself, and you’re the easiest person to fool.

That’s a lot more than 1/10, and he’s talking mostly to future scientists, not developers.