context: There is little chance that John is in the office. Chances are about even that Lily is a lion. Chances are about even that Brian is a rhino.
hypothesis: Chances are about even that either John is in the office, or Lily is a lion.
valid_hypothesis: Chances are about even that either John is in the office, or Lily is a lion.
invalid_hypothesis: There is almost no chance that either John is in the office, or Lily is a lion.
hypothesis_assertion: Either John is in the office, or Lily is a lion.