Frasier paraphrases George Bernard Shaw as saying "in this world there are only two tragedies. One is not getting what one wants, and the other is getting it." Kate Costas says this quote is by Oscar Wilde. She is correct.
Frasier and Kate argue over the key signature of Bartok's Concerto for Orchestra, with Frasier saying it is D-minor and Kate saying it is C. Neither is correct. The concerto does not specify the key in which it is played. As with many more modern pieces, the parts are written without key signature, using accidentals instead. This could make the piece appear to be in C to a casual observer.