context: It is probably not the case that Fred went to the garden. It is highly unlikely that Mary picked up the apple. It is probably not the case that Greg is a lion.
hypothesis: Chances are about even that fred went to the garden, or Greg is a lion.
valid_hypothesis: Chances are about even that fred went to the garden, or Greg is a lion.
invalid_hypothesis: There is almost no chance that fred went to the garden, or Greg is a lion.
hypothesis_assertion: Fred went to the garden, or Greg is a lion.