- If it disagrees with experiment, it is wrong.
That’s from Richard Feynman, who should know a thing or two about science and experiments.
The full quote, from a book review in Skeptical Inquirer (Sept/Oct 2011, p 57):
If it disagrees with experiment, it is wrong. In that simple statement is the key to science. It doesn’t make any difference how beautiful your guess is, how smart you are, who make the guess, or what his name is. If it disagrees with experiment, it’s wrong. That’s all there is to it.
We’ve all encountered folks with beliefs that simply don’t match up with reality; some of them are us. Many such beliefs are non-falsifiable, sometimes carefully phrased that way, making experiment irrelevant.