context: It is probably the case that John moved to the garden. It is probably the case that Mary dropped the milk. It is likely that Brian is gray.
hypothesis: Chances are about even that brian is gray, and Mary dropped the milk.
valid_hypothesis: Chances are about even that brian is gray, and Mary dropped the milk.
invalid_hypothesis: It is impossible that brian is gray, and Mary dropped the milk.
hypothesis_assertion: Brian is gray, and Mary dropped the milk.