context: It is probably the case that Mary picked up the milk. We believe that John discarded the apple. There is little chance that Lily is a rhino. It is highly unlikely that if Lily is a rhino, and John discarded the apple, then Julius is a frog. It is likely that if Mary picked up the milk, and John discarded the apple, then Brian is green. It is improbable that if either John discarded the apple, or Lily is a rhino, then Sandra got the football.
hypothesis: It is certain that brian is green, or Julius is a frog.
valid_hypothesis: It is probably not the case that brian is green, or Julius is a frog.
invalid_hypothesis: It is certain that brian is green, or Julius is a frog.
hypothesis_assertion: Brian is green, or Julius is a frog.