context: There is little chance that Gertrude is a cat. There is almost no chance that Mary moved to the garden. It is unlikely that Sandra put down the milk. It is highly likely that if Sandra put down the milk, or Mary moved to the garden, then Daniel left the apple. Chances are slight that if Sandra put down the milk, and Gertrude is a cat, then Greg is green. We believe that if either Gertrude is a cat, or Sandra put down the milk, then Brian is gray.
hypothesis: It is certain that sandra put down the milk, and Gertrude is a cat.
valid_hypothesis: There is almost no chance that sandra put down the milk, and Gertrude is a cat.
invalid_hypothesis: It is certain that sandra put down the milk, and Gertrude is a cat.
hypothesis_assertion: Sandra put down the milk, and Gertrude is a cat.