context: Chances are about even that Greg is a rhino. It is impossible that Bernhard is gray. It is improbable that Brian is green. There is almost no chance that if either Bernhard is gray, or Brian is green, then Winona is a mouse. We doubt that if either Brian is green, or Bernhard is gray, then Sandra took the football. It is almost certain that if Greg is a rhino, or Bernhard is gray, then Mary moved to the office.
hypothesis: It is probable that sandra took the football, or Bernhard is gray.
valid_hypothesis: There is almost no chance that sandra took the football, or Bernhard is gray.
invalid_hypothesis: It is probable that sandra took the football, or Bernhard is gray.
hypothesis_assertion: Sandra took the football, or Bernhard is gray.