context: There is a better than even chance that Lily is a rhino. There is a better than even chance that Brian is a frog. It is unlikely that Greg is a lion. It is probably the case that if either Lily is a rhino, or Greg is a lion, then John left the apple. It is highly unlikely that if either Brian is a frog, or Lily is a rhino, then Gertrude is a mouse. It is almost certain that if Greg is a lion, or Brian is a frog, then Mary got the football.
hypothesis: Chances are about even that either Gertrude is a mouse, or John left the apple.
valid_hypothesis: Chances are about even that either Gertrude is a mouse, or John left the apple.
invalid_hypothesis: It is impossible that either Gertrude is a mouse, or John left the apple.
hypothesis_assertion: Either Gertrude is a mouse, or John left the apple.