context: There is a better than even chance that Greg is a frog. There is little chance that Brian is green. There is a very good chance that Lily is gray. It is highly likely that if Lily is gray, and Greg is a frog, then Mary dropped the milk. It is impossible that if either Brian is green, or Greg is a frog, then Sandra took the football. There is almost no chance that if Brian is green, or Lily is gray, then John picked up the apple.
hypothesis: It is highly unlikely that either Greg is a frog, or Lily is gray.
valid_hypothesis: Chances are about even that either Greg is a frog, or Lily is gray.
invalid_hypothesis: It is highly unlikely that either Greg is a frog, or Lily is gray.
hypothesis_assertion: Either Greg is a frog, or Lily is gray.