context: It is probably the case that Mary went to the garden. We doubt that Bernhard is a rhino. It is unlikely that Lily is white. It is highly unlikely that if either Bernhard is a rhino, or Lily is white, then Jessica is a sheep. It is highly unlikely that if Mary went to the garden, and Lily is white, then Greg is a frog. It is likely that if Mary went to the garden, and Lily is white, then Fred dropped the apple.
hypothesis: Chances are slight that greg is a frog, or Fred dropped the apple.
valid_hypothesis: Chances are slight that greg is a frog, or Fred dropped the apple.
invalid_hypothesis: We believe that greg is a frog, or Fred dropped the apple.
hypothesis_assertion: Greg is a frog, or Fred dropped the apple.