context: There is almost no chance that Julius is yellow. We believe that John discarded the milk. There is almost no chance that Brian is a swan. It is improbable that if either Julius is yellow, or Brian is a swan, then Bernhard is a rhino. There is little chance that if either Julius is yellow, or John discarded the milk, then Greg is a frog. There is a better than even chance that if John discarded the milk, and Julius is yellow, then Jeff went to the kitchen.
hypothesis: It is certain that either Jeff went to the kitchen, or Greg is a frog.
valid_hypothesis: There is little chance that either Jeff went to the kitchen, or Greg is a frog.
invalid_hypothesis: It is certain that either Jeff went to the kitchen, or Greg is a frog.
hypothesis_assertion: Either Jeff went to the kitchen, or Greg is a frog.