context: There is little chance that John left the football. We believe that Greg is a frog. Chances are slight that Brian is a lion. Chances are slight that if John left the football, or Greg is a frog, then Jessica is a mouse. It is probably not the case that if either John left the football, or Greg is a frog, then Mary is in the park. There is little chance that if either Brian is a lion, or Greg is a frog, then Sandra dropped the milk.
hypothesis: It is highly likely that either Jessica is a mouse, or Brian is a lion.
valid_hypothesis: It is unlikely that either Jessica is a mouse, or Brian is a lion.
invalid_hypothesis: It is highly likely that either Jessica is a mouse, or Brian is a lion.
hypothesis_assertion: Either Jessica is a mouse, or Brian is a lion.