context: There is almost no chance that Sandra left the milk. There is a very good chance that Bill is in the cinema. It is highly unlikely that Greg is green.
hypothesis: It is impossible that greg is green, and Sandra left the milk.
valid_hypothesis: It is impossible that greg is green, and Sandra left the milk.
invalid_hypothesis: It is probably the case that greg is green, and Sandra left the milk.
hypothesis_assertion: Greg is green, and Sandra left the milk.