context: It is impossible that John discarded the milk. There is almost no chance that Brian is green. It is improbable that Greg is a frog.
hypothesis: It is probably the case that greg is a frog, and Brian is green.
valid_hypothesis: It is impossible that greg is a frog, and Brian is green.
invalid_hypothesis: It is probably the case that greg is a frog, and Brian is green.
hypothesis_assertion: Greg is a frog, and Brian is green.