In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.

Sentence 1: Obviously, evolutionary psychology hasn't yet come close to finding the Holy Grail. Sentence 2: The holy grail of evolutionary psychology is when early man began using tools.
no