context: It is almost certain that Julius is a lion. It is improbable that John moved to the office. There is little chance that Mary went to the kitchen. There is almost no chance that if either Julius is a lion, or John moved to the office, then Brian is a frog. It is probably the case that if John moved to the office, and Mary went to the kitchen, then Gertrude is a mouse. It is almost certain that if John moved to the office, or Julius is a lion, then Greg is a rhino.
hypothesis: It is improbable that mary went to the kitchen, and Greg is a rhino.
valid_hypothesis: It is improbable that mary went to the kitchen, and Greg is a rhino.
invalid_hypothesis: There is a better than even chance that mary went to the kitchen, and Greg is a rhino.
hypothesis_assertion: Mary went to the kitchen, and Greg is a rhino.