context: It is improbable that Jeff went to the office. Chances are about even that Brian is a frog. Chances are about even that Lily is green.
hypothesis: Chances are about even that either Brian is a frog, or Lily is green.
valid_hypothesis: Chances are about even that either Brian is a frog, or Lily is green.
invalid_hypothesis: It is certain that either Brian is a frog, or Lily is green.
hypothesis_assertion: Either Brian is a frog, or Lily is green.