context: There is almost no chance that Greg is a frog. It is unlikely that Emily is a wolf. It is impossible that Bill went to the bedroom. It is probably the case that if Greg is a frog, or Emily is a wolf, then Julius is a swan. It is unlikely that if Bill went to the bedroom, and Greg is a frog, then Fred left the football. It is probably not the case that if Bill went to the bedroom, or Emily is a wolf, then Bernhard is a frog.
hypothesis: It is impossible that fred left the football, and Emily is a wolf.
valid_hypothesis: It is impossible that fred left the football, and Emily is a wolf.
invalid_hypothesis: There is a better than even chance that fred left the football, and Emily is a wolf.
hypothesis_assertion: Fred left the football, and Emily is a wolf.