Stream of consciousness rationale: The greyhounds cannot race and be sleeping at the same time.
The question and answer pair are described below.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Q: Given the sentence "Two greyhounds race." is it true that "The greyhounds are sleeping."?
A: no