context: It is probably not the case that Brian is yellow. It is highly likely that John left the milk. It is probably not the case that Mary grabbed the milk.
hypothesis: It is likely that brian is yellow, and John left the milk.
valid_hypothesis: It is probably not the case that brian is yellow, and John left the milk.
invalid_hypothesis: It is likely that brian is yellow, and John left the milk.
hypothesis_assertion: Brian is yellow, and John left the milk.