There's another story about Feynman, somewhat related to this issue. He had worked out the V-A structure of the weak force which had been an outstanding puzzle for some time. At some later point he was visiting CERN and they during the tour the guide said something along the lines of "Oh! Professor Feynman! This [huge experiment and expensive detector] is to test your theory of [such and such blah blah blah]."

Feynman smiled and said, "What, you don't trust me?"