context: We doubt that Jeff went to the garden. It is highly likely that Bernhard is a frog. Chances are slight that Greg is a swan. It is impossible that if Greg is a swan, and Bernhard is a frog, then Julius is a lion. It is almost certain that if either Greg is a swan, or Jeff went to the garden, then Daniel took the football. It is highly unlikely that if Jeff went to the garden, and Greg is a swan, then Lily is white.
hypothesis: It is impossible that jeff went to the garden, or Bernhard is a frog.
valid_hypothesis: It is highly likely that jeff went to the garden, or Bernhard is a frog.
invalid_hypothesis: It is impossible that jeff went to the garden, or Bernhard is a frog.
hypothesis_assertion: Jeff went to the garden, or Bernhard is a frog.