context: It is unlikely that Emily is a mouse. There is almost no chance that Mary left the milk. There is almost no chance that Brian is gray.
hypothesis: It is impossible that mary left the milk, and Brian is gray.
valid_hypothesis: It is impossible that mary left the milk, and Brian is gray.
invalid_hypothesis: It is probably the case that mary left the milk, and Brian is gray.
hypothesis_assertion: Mary left the milk, and Brian is gray.