context: It is likely that Lily is a frog. We doubt that Brian is a lion. It is impossible that Fred left the football. There is a very good chance that if Fred left the football, or Lily is a frog, then Greg is a rhino. It is certain that if either Lily is a frog, or Brian is a lion, then Bernhard is a swan. Chances are slight that if Brian is a lion, and Fred left the football, then John discarded the milk.
hypothesis: There is a better than even chance that fred left the football, or Bernhard is a swan.
valid_hypothesis: There is a better than even chance that fred left the football, or Bernhard is a swan.
invalid_hypothesis: It is highly unlikely that fred left the football, or Bernhard is a swan.
hypothesis_assertion: Fred left the football, or Bernhard is a swan.