context: We believe that Mary went to the kitchen. It is highly unlikely that Greg is a lion. It is impossible that Bernhard is gray.
hypothesis: It is impossible that greg is a lion, and Bernhard is gray.
valid_hypothesis: It is impossible that greg is a lion, and Bernhard is gray.
invalid_hypothesis: It is highly likely that greg is a lion, and Bernhard is gray.
hypothesis_assertion: Greg is a lion, and Bernhard is gray.