context: It is likely that Lily is a frog. It is likely that Mary moved to the office. Chances are about even that Greg is a swan.
hypothesis: There is a very good chance that greg is a swan, or Lily is a frog.
valid_hypothesis: There is a very good chance that greg is a swan, or Lily is a frog.
invalid_hypothesis: There is little chance that greg is a swan, or Lily is a frog.
hypothesis_assertion: Greg is a swan, or Lily is a frog.