context: It is probably the case that Sandra took the milk. It is impossible that Greg is white. It is probably not the case that Julius is green. It is unlikely that if Julius is green, and Sandra took the milk, then Brian is a lion. It is likely that if either Greg is white, or Julius is green, then Mary went to the kitchen. We believe that if either Sandra took the milk, or Julius is green, then Emily is a cat.
hypothesis: Chances are about even that either Emily is a cat, or Greg is white.
valid_hypothesis: Chances are about even that either Emily is a cat, or Greg is white.
invalid_hypothesis: It is almost certain that either Emily is a cat, or Greg is white.
hypothesis_assertion: Either Emily is a cat, or Greg is white.