context: It is likely that Lily is yellow. Chances are slight that John discarded the apple. Chances are slight that Mary put down the milk. It is unlikely that if either Lily is yellow, or John discarded the apple, then Greg is a lion. We doubt that if Mary put down the milk, or Lily is yellow, then Julius is a swan. There is little chance that if John discarded the apple, or Mary put down the milk, then Fred moved to the office.
hypothesis: It is probably the case that either Mary put down the milk, or Lily is yellow.
valid_hypothesis: It is probably the case that either Mary put down the milk, or Lily is yellow.
invalid_hypothesis: It is improbable that either Mary put down the milk, or Lily is yellow.
hypothesis_assertion: Either Mary put down the milk, or Lily is yellow.