context: It is highly likely that John went to the hallway. Chances are about even that Bernhard is green. Chances are slight that Greg is a frog.
hypothesis: It is impossible that either Greg is a frog, or John went to the hallway.
valid_hypothesis: There is a very good chance that either Greg is a frog, or John went to the hallway.
invalid_hypothesis: It is impossible that either Greg is a frog, or John went to the hallway.
hypothesis_assertion: Either Greg is a frog, or John went to the hallway.