context: Chances are about even that John put down the milk. It is highly unlikely that Daniel left the football. There is a very good chance that Brian is a frog.
hypothesis: Chances are about even that brian is a frog, and John put down the milk.
valid_hypothesis: Chances are about even that brian is a frog, and John put down the milk.
invalid_hypothesis: It is certain that brian is a frog, and John put down the milk.
hypothesis_assertion: Brian is a frog, and John put down the milk.