context: It is probably not the case that Yann is tired. Chances are slight that Bernhard is yellow. It is unlikely that Brian is a frog.
hypothesis: Chances are about even that brian is a frog, or Yann is tired.
valid_hypothesis: Chances are about even that brian is a frog, or Yann is tired.
invalid_hypothesis: There is almost no chance that brian is a frog, or Yann is tired.
hypothesis_assertion: Brian is a frog, or Yann is tired.