context: Chances are about even that Sandra left the football. It is impossible that Bernhard is yellow. Chances are about even that Mary went to the office.
hypothesis: It is certain that either Bernhard is yellow, or Sandra left the football.
valid_hypothesis: Chances are about even that either Bernhard is yellow, or Sandra left the football.
invalid_hypothesis: It is certain that either Bernhard is yellow, or Sandra left the football.
hypothesis_assertion: Either Bernhard is yellow, or Sandra left the football.