context: Chances are slight that John went to the garden. There is a very good chance that Sandra left the apple. It is unlikely that Bill dropped the milk. It is almost certain that if either Bill dropped the milk, or John went to the garden, then Julius is white. It is almost certain that if either Sandra left the apple, or Bill dropped the milk, then Gertrude is a mouse. It is highly unlikely that if John went to the garden, and Sandra left the apple, then Mary moved to the office.
hypothesis: It is impossible that julius is white, and Mary moved to the office.
valid_hypothesis: It is impossible that julius is white, and Mary moved to the office.
invalid_hypothesis: There is a better than even chance that julius is white, and Mary moved to the office.
hypothesis_assertion: Julius is white, and Mary moved to the office.