context: It is likely that Sandra got the milk. It is probably the case that Bernhard is gray. It is probably the case that Lily is a frog. We doubt that if either Sandra got the milk, or Bernhard is gray, then John went to the bedroom. It is likely that if Sandra got the milk, or Lily is a frog, then Mary left the apple. Chances are about even that if either Lily is a frog, or Bernhard is gray, then Julius is green.
hypothesis: It is highly unlikely that either Sandra got the milk, or Julius is green.
valid_hypothesis: There is a better than even chance that either Sandra got the milk, or Julius is green.
invalid_hypothesis: It is highly unlikely that either Sandra got the milk, or Julius is green.
hypothesis_assertion: Either Sandra got the milk, or Julius is green.