context: It is highly likely that Mary went to the garden. It is unlikely that Brian is green. It is highly likely that Lily is gray. It is highly likely that if Lily is gray, or Brian is green, then Sandra got the milk. It is probably not the case that if Brian is green, and Mary went to the garden, then John left the football. Chances are about even that if either Mary went to the garden, or Lily is gray, then Greg is a rhino.
hypothesis: It is certain that lily is gray, and Brian is green.
valid_hypothesis: It is unlikely that lily is gray, and Brian is green.
invalid_hypothesis: It is certain that lily is gray, and Brian is green.
hypothesis_assertion: Lily is gray, and Brian is green.