context: Chances are about even that Greg is a rhino. Chances are about even that Brian is yellow. It is almost certain that Mary left the football. There is a very good chance that if Brian is yellow, or Greg is a rhino, then John moved to the garden. There is almost no chance that if Greg is a rhino, or Mary left the football, then Bernhard is a lion. It is improbable that if either Greg is a rhino, or Brian is yellow, then Julius is a frog.
hypothesis: We believe that julius is a frog, and Mary left the football.
valid_hypothesis: It is highly unlikely that julius is a frog, and Mary left the football.
invalid_hypothesis: We believe that julius is a frog, and Mary left the football.
hypothesis_assertion: Julius is a frog, and Mary left the football.