context: It is improbable that Julius is a rhino. It is unlikely that Mary went to the kitchen. There is little chance that Daniel is in the garden. It is unlikely that if Mary went to the kitchen, or Julius is a rhino, then John moved to the garden. It is highly likely that if Julius is a rhino, and Mary went to the kitchen, then Sandra got the apple. There is a better than even chance that if Mary went to the kitchen, and Daniel is in the garden, then Brian is a lion.
hypothesis: There is little chance that either Julius is a rhino, or John moved to the garden.
valid_hypothesis: There is little chance that either Julius is a rhino, or John moved to the garden.
invalid_hypothesis: It is certain that either Julius is a rhino, or John moved to the garden.
hypothesis_assertion: Either Julius is a rhino, or John moved to the garden.