context: It is probably not the case that Brian is a lion. We doubt that Greg is a frog. It is certain that Daniel left the apple. There is almost no chance that if either Greg is a frog, or Daniel left the apple, then Lily is white. It is highly likely that if Daniel left the apple, and Greg is a frog, then Julius is gray. There is little chance that if Greg is a frog, and Daniel left the apple, then John put down the apple.
hypothesis: Chances are about even that greg is a frog, or Brian is a lion.
valid_hypothesis: Chances are about even that greg is a frog, or Brian is a lion.
invalid_hypothesis: It is impossible that greg is a frog, or Brian is a lion.
hypothesis_assertion: Greg is a frog, or Brian is a lion.