context: It is probably the case that Julius is a frog. It is highly likely that Bernhard is a rhino. It is impossible that Lily is a frog. It is impossible that if Lily is a frog, and Bernhard is a rhino, then John went to the hallway. Chances are about even that if Lily is a frog, and Bernhard is a rhino, then Greg is yellow. Chances are about even that if Lily is a frog, or Bernhard is a rhino, then Brian is a swan.
hypothesis: Chances are about even that either Lily is a frog, or Brian is a swan.
valid_hypothesis: Chances are about even that either Lily is a frog, or Brian is a swan.
invalid_hypothesis: There is almost no chance that either Lily is a frog, or Brian is a swan.
hypothesis_assertion: Either Lily is a frog, or Brian is a swan.