context: It is almost certain that Sandra dropped the milk. It is highly likely that Jeff went to the kitchen. We believe that Julie is in the bedroom. Chances are about even that if Jeff went to the kitchen, and Sandra dropped the milk, then Brian is gray. We believe that if Jeff went to the kitchen, and Sandra dropped the milk, then Lily is a frog. There is little chance that if Jeff went to the kitchen, and Sandra dropped the milk, then Jessica is a mouse.
hypothesis: It is certain that jeff went to the kitchen, or Sandra dropped the milk.
valid_hypothesis: It is certain that jeff went to the kitchen, or Sandra dropped the milk.
invalid_hypothesis: There is little chance that jeff went to the kitchen, or Sandra dropped the milk.
hypothesis_assertion: Jeff went to the kitchen, or Sandra dropped the milk.