context: Chances are slight that Mary moved to the office. It is likely that Brian is a frog. There is almost no chance that Bernhard is a rhino. It is improbable that if Brian is a frog, or Bernhard is a rhino, then John took the football. It is likely that if Bernhard is a rhino, and Brian is a frog, then Greg is gray. It is almost certain that if Brian is a frog, and Mary moved to the office, then Julius is white.
hypothesis: It is improbable that either Brian is a frog, or John took the football.
valid_hypothesis: There is a better than even chance that either Brian is a frog, or John took the football.
invalid_hypothesis: It is improbable that either Brian is a frog, or John took the football.
hypothesis_assertion: Either Brian is a frog, or John took the football.