context: It is likely that Mary left the football. Chances are slight that Bill dropped the apple. There is almost no chance that John moved to the office.
hypothesis: It is impossible that mary left the football, or Bill dropped the apple.
valid_hypothesis: We believe that mary left the football, or Bill dropped the apple.
invalid_hypothesis: It is impossible that mary left the football, or Bill dropped the apple.
hypothesis_assertion: Mary left the football, or Bill dropped the apple.