context: It is probable that John went to the hallway. It is probable that Mary picked up the apple. It is almost certain that Lily is a frog. It is improbable that if either John went to the hallway, or Lily is a frog, then Sandra left the apple. It is highly likely that if either Lily is a frog, or John went to the hallway, then Fred moved to the office. There is almost no chance that if Lily is a frog, or John went to the hallway, then Brian is gray.
hypothesis: It is probable that either John went to the hallway, or Brian is gray.
valid_hypothesis: It is probable that either John went to the hallway, or Brian is gray.
invalid_hypothesis: It is unlikely that either John went to the hallway, or Brian is gray.
hypothesis_assertion: Either John went to the hallway, or Brian is gray.