context: We doubt that Brian is yellow. It is highly unlikely that Julius is a swan. Chances are slight that Greg is gray. There is almost no chance that if Julius is a swan, and Greg is gray, then Mary moved to the garden. We believe that if Julius is a swan, or Greg is gray, then Sandra left the milk. We believe that if Greg is gray, and Julius is a swan, then Jeff went to the office.
hypothesis: There is little chance that jeff went to the office, or Greg is gray.
valid_hypothesis: There is little chance that jeff went to the office, or Greg is gray.
invalid_hypothesis: It is probably the case that jeff went to the office, or Greg is gray.
hypothesis_assertion: Jeff went to the office, or Greg is gray.