The story is that Einstein was shown a German newspaper that claimed "One hundred German physicists claim Einsteins theory of relativity is wrong." Einsteins reply was supposedly, "If I were wrong, it would only take one." I have looked and looked for this story and I can't find it anywhere. Did I just dream of it?
If I were wrong, then one [author] would have been enough!
Einstein’s retort with regard to his theory when he heard that a book titled 100 Authors against Einstein was published in Germany. Quoted in Stephen Hawking, A Brief History of Time (London: Bantam, 1988), 178