Riddle

Surprise test impossible logic?

Choose an answer

A.The students are lazy
B.The professor lied
C.The test was on Monday
D.Paradox
Hint: It's a word with 7 letters, starting with "P".

Answer

Paradox

Why this is the answer

If the test hasn't happened by Thursday, the students know it must be Friday (so it's not a surprise). This logic continues backward to Monday, 'proving' it can never be a surprise.

This riddle is filed under Expert Riddles for Adults and rated Hard.