Richard Feynman and the word “muggles”

The word “muggles”, so prominently used in the Harry Potter novels, may have danced through the speech of physicist Richard Feynman. Investigator David Kessler writes: In this youtube video [below], Feynman is discussing how scientists develop and test theories.  At 05:10 he says this: “I must also point out to you that you cannot prove a ‘vague’ […]