context: It is probably the case that John moved to the garden. It is highly unlikely that Lily is white. Chances are about even that Bernhard is green. There is little chance that if Bernhard is green, or John moved to the garden, then Julius is yellow. It is improbable that if John moved to the garden, or Bernhard is green, then Mary dropped the milk. There is a very good chance that if either John moved to the garden, or Bernhard is green, then Brian is a swan.
hypothesis: It is certain that either John moved to the garden, or Bernhard is green.
valid_hypothesis: Chances are about even that either John moved to the garden, or Bernhard is green.
invalid_hypothesis: It is certain that either John moved to the garden, or Bernhard is green.
hypothesis_assertion: Either John moved to the garden, or Bernhard is green.