Context: Feynman diagrams are now fundamental for string theory and M-theory, and have even been extended topologically. The world-lines of the diagrams have developed to become tubes to allow better modeling of more complicated objects such as strings and membranes. Shortly before his death, Feynman criticized string theory in an interview: "I don't like that they're not calculating anything," he said. "I don't like that they don't check their ideas. I don't like that for anything that disagrees with an experiment, they cook up an explanation—a fix-up to say, 'Well, it still might be true.'" These words have since been much-quoted by opponents of the string-theoretic direction for particle physics.

Question: What theories do Feynman diagrams help explain?
Answer: string theory and M-theory

Question: The diagrams have been made from lines into what 3 dimensional shape?
Answer: tubes

Question: What angst did Feynman have against string theorists?
Answer: they don't check their ideas

Question: Which quote by Feynman is often used by string theory opponents?
Answer: 'Well, it still might be true.'"

Question: What theories do Feynman diagrams not explain?
Answer: Unanswerable

Question: What 4 dimensional shape have Feynman diagrams been made into?
Answer: Unanswerable

Question: What angst did Feynman have against churchgoers?
Answer: Unanswerable

Question: Which quote by Feynman is often used by religious opponents?
Answer: Unanswerable

Question: What kind of physics was Feynman least interested in?
Answer: Unanswerable