context: We believe that Mary went to the kitchen. It is impossible that Brian is a rhino. We believe that Sandra took the apple.
hypothesis: It is probably not the case that either Mary went to the kitchen, or Sandra took the apple.
valid_hypothesis: It is probably not the case that either Mary went to the kitchen, or Sandra took the apple.
invalid_hypothesis: It is certain that either Mary went to the kitchen, or Sandra took the apple.
hypothesis_assertion: Either Mary went to the kitchen, or Sandra took the apple.