context: We doubt that Bernhard is a swan. We doubt that John took the apple. It is probably the case that Julius is a frog. It is likely that if either John took the apple, or Julius is a frog, then Mary is in the bedroom. We doubt that if either Bernhard is a swan, or John took the apple, then Brian is a lion. We believe that if Bernhard is a swan, and John took the apple, then Gertrude is a wolf.
hypothesis: It is certain that mary is in the bedroom, and Julius is a frog.
valid_hypothesis: Chances are about even that mary is in the bedroom, and Julius is a frog.
invalid_hypothesis: It is certain that mary is in the bedroom, and Julius is a frog.
hypothesis_assertion: Mary is in the bedroom, and Julius is a frog.