context: We doubt that Julius is green. There is a very good chance that John got the football. It is improbable that Fred left the football.
hypothesis: Chances are slight that either John got the football, or Fred left the football.
valid_hypothesis: We believe that either John got the football, or Fred left the football.
invalid_hypothesis: Chances are slight that either John got the football, or Fred left the football.
hypothesis_assertion: Either John got the football, or Fred left the football.