context: We believe that Brian is white. It is probably the case that Lily is green. It is unlikely that Daniel dropped the milk. It is almost certain that if Daniel dropped the milk, or Brian is white, then John put down the apple. There is little chance that if Lily is green, or Daniel dropped the milk, then Jeff discarded the milk. Chances are about even that if either Lily is green, or Brian is white, then Greg is a frog.
hypothesis: It is unlikely that greg is a frog, or John put down the apple.
valid_hypothesis: There is a very good chance that greg is a frog, or John put down the apple.
invalid_hypothesis: It is unlikely that greg is a frog, or John put down the apple.
hypothesis_assertion: Greg is a frog, or John put down the apple.