context: It is improbable that Greg is gray. We believe that Bernhard is a frog. We believe that Sumit is tired. It is probably not the case that if Greg is gray, or Bernhard is a frog, then John left the football. It is probably the case that if either Sumit is tired, or Bernhard is a frog, then Bill dropped the milk. Chances are slight that if Bernhard is a frog, or Sumit is tired, then Mary took the apple.
hypothesis: It is probably not the case that either John left the football, or Sumit is tired.
valid_hypothesis: It is probable that either John left the football, or Sumit is tired.
invalid_hypothesis: It is probably not the case that either John left the football, or Sumit is tired.
hypothesis_assertion: Either John left the football, or Sumit is tired.