context: It is probably the case that Mary put down the milk. There is little chance that Brian is a lion. It is highly likely that John went to the garden. It is probably the case that if either John went to the garden, or Mary put down the milk, then Gertrude is a mouse. It is unlikely that if either Mary put down the milk, or John went to the garden, then Daniel is in the garden. It is probable that if either John went to the garden, or Mary put down the milk, then Greg is white.
hypothesis: It is highly unlikely that brian is a lion, and Mary put down the milk.
valid_hypothesis: It is highly unlikely that brian is a lion, and Mary put down the milk.
invalid_hypothesis: There is a very good chance that brian is a lion, and Mary put down the milk.
hypothesis_assertion: Brian is a lion, and Mary put down the milk.