context: We doubt that Bernhard is a frog. It is impossible that Bill went to the hallway. Chances are about even that Lily is green. There is almost no chance that if Bill went to the hallway, and Lily is green, then Brian is a rhino. It is probable that if either Lily is green, or Bernhard is a frog, then John discarded the milk. It is unlikely that if Lily is green, and Bernhard is a frog, then Mary moved to the office.
hypothesis: Chances are about even that either Lily is green, or Bernhard is a frog.
valid_hypothesis: Chances are about even that either Lily is green, or Bernhard is a frog.
invalid_hypothesis: It is certain that either Lily is green, or Bernhard is a frog.
hypothesis_assertion: Either Lily is green, or Bernhard is a frog.