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Is every thing in the empty list a number?

(every number? '())

  • A: Yes: Got to be good-looking 'cause it's so hard to see.
  • B: No: There is nothing in the empty list that could be a number.
  • C: Maybe: Depends on the implementation.
  • D: Error: () is an improper argument to every.
  • E: WTF: I thought this was CS, not Philosophy.

    Answer