context: It is certain that John dropped the milk. There is a better than even chance that Greg is white. It is highly unlikely that Julius is a frog. There is a better than even chance that if Greg is white, or Julius is a frog, then Sandra left the milk. It is highly unlikely that if John dropped the milk, and Julius is a frog, then Mary got the apple. There is almost no chance that if Julius is a frog, and John dropped the milk, then Brian is white.
hypothesis: There is a better than even chance that either John dropped the milk, or Sandra left the milk.
valid_hypothesis: There is a better than even chance that either John dropped the milk, or Sandra left the milk.
invalid_hypothesis: It is highly unlikely that either John dropped the milk, or Sandra left the milk.
hypothesis_assertion: Either John dropped the milk, or Sandra left the milk.