context: It is improbable that Greg is a frog. There is almost no chance that Fred dropped the milk. It is impossible that Bernhard is yellow.
hypothesis: It is impossible that greg is a frog, and Fred dropped the milk.
valid_hypothesis: It is impossible that greg is a frog, and Fred dropped the milk.
invalid_hypothesis: It is probable that greg is a frog, and Fred dropped the milk.
hypothesis_assertion: Greg is a frog, and Fred dropped the milk.