context: It is highly likely that Mary got the football. It is highly likely that Julius is a frog. It is highly unlikely that Bernhard is a lion. We believe that if either Julius is a frog, or Bernhard is a lion, then Julie is in the bedroom. There is almost no chance that if Mary got the football, and Julius is a frog, then Brian is yellow. Chances are about even that if Bernhard is a lion, and Mary got the football, then Greg is green.
hypothesis: It is impossible that julius is a frog, and Mary got the football.
valid_hypothesis: There is a very good chance that julius is a frog, and Mary got the football.
invalid_hypothesis: It is impossible that julius is a frog, and Mary got the football.
hypothesis_assertion: Julius is a frog, and Mary got the football.