context: Chances are about even that Greg is yellow. It is probably the case that Winona is a cat. There is little chance that Mary went to the bedroom.
hypothesis: It is probable that winona is a cat, and Greg is yellow.
valid_hypothesis: It is probably not the case that winona is a cat, and Greg is yellow.
invalid_hypothesis: It is probable that winona is a cat, and Greg is yellow.
hypothesis_assertion: Winona is a cat, and Greg is yellow.