context: It is certain that Greg is a frog. Chances are slight that John discarded the milk. Chances are slight that Sandra dropped the apple. There is little chance that if either Sandra dropped the apple, or Greg is a frog, then Brian is white. It is probable that if Sandra dropped the apple, or Greg is a frog, then Daniel took the football. It is impossible that if Sandra dropped the apple, or Greg is a frog, then Julius is a rhino.
hypothesis: It is impossible that julius is a rhino, and Brian is white.
valid_hypothesis: It is impossible that julius is a rhino, and Brian is white.
invalid_hypothesis: It is almost certain that julius is a rhino, and Brian is white.
hypothesis_assertion: Julius is a rhino, and Brian is white.