X is the father of Y, but Y is not the son of X. How is Y related to X?

  • A. Daughter
  • B. Nephew
  • C. Niece
  • D. Cannot be determined

Explanation

If X is Y's father then Y is X's child, and since Y is not a son, Y must be a daughter. Puzzles of this shape exist to catch the assumption that a child is male by default. A nephew or niece would make X an uncle rather than a father.

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