context: It is probable that Jessica is a cat. It is probable that John took the apple. It is probably the case that Brian is a frog. It is improbable that if either John took the apple, or Brian is a frog, then Mary went to the bedroom. Chances are about even that if Jessica is a cat, or John took the apple, then Yann got the milk there. It is likely that if either Jessica is a cat, or John took the apple, then Sandra left the milk.
hypothesis: There is almost no chance that brian is a frog, and Mary went to the bedroom.
valid_hypothesis: There is almost no chance that brian is a frog, and Mary went to the bedroom.
invalid_hypothesis: There is a very good chance that brian is a frog, and Mary went to the bedroom.
hypothesis_assertion: Brian is a frog, and Mary went to the bedroom.