context: It is improbable that Brian is gray. Chances are about even that Julius is a frog. It is probably the case that Mary left the apple. It is certain that if Julius is a frog, and Brian is gray, then Fred moved to the office. We believe that if either Julius is a frog, or Brian is gray, then John went to the hallway. It is certain that if Julius is a frog, and Brian is gray, then Greg is a swan.
hypothesis: It is certain that brian is gray, or John went to the hallway.
valid_hypothesis: Chances are about even that brian is gray, or John went to the hallway.
invalid_hypothesis: It is certain that brian is gray, or John went to the hallway.
hypothesis_assertion: Brian is gray, or John went to the hallway.