context: It is likely that Lily is a frog. There is a better than even chance that Bill moved to the office. It is likely that Mary put down the apple. Chances are about even that if Bill moved to the office, and Mary put down the apple, then John went to the bedroom. It is unlikely that if Bill moved to the office, and Mary put down the apple, then Sandra left the football. It is almost certain that if Mary put down the apple, and Bill moved to the office, then Brian is yellow.
hypothesis: Chances are about even that either Lily is a frog, or Bill moved to the office.
valid_hypothesis: Chances are about even that either Lily is a frog, or Bill moved to the office.
invalid_hypothesis: There is almost no chance that either Lily is a frog, or Bill moved to the office.
hypothesis_assertion: Either Lily is a frog, or Bill moved to the office.