context: It is almost certain that Yann is tired. Chances are about even that Mary went to the garden. It is likely that Daniel dropped the milk. There is little chance that if either Yann is tired, or Daniel dropped the milk, then Brian is green. It is probable that if Mary went to the garden, and Daniel dropped the milk, then Sandra took the apple. It is impossible that if Yann is tired, or Mary went to the garden, then Greg is green.
hypothesis: It is certain that daniel dropped the milk, or Yann is tired.
valid_hypothesis: It is certain that daniel dropped the milk, or Yann is tired.
invalid_hypothesis: It is highly unlikely that daniel dropped the milk, or Yann is tired.
hypothesis_assertion: Daniel dropped the milk, or Yann is tired.