context: It is probably not the case that Julius is green. There is a better than even chance that Lily is a swan. There is a better than even chance that Winona is a cat. It is improbable that if Julius is green, and Lily is a swan, then Mary went to the office. It is likely that if Julius is green, or Winona is a cat, then John put down the milk. It is improbable that if either Lily is a swan, or Winona is a cat, then Greg is a frog.
hypothesis: Chances are about even that either John put down the milk, or Greg is a frog.
valid_hypothesis: Chances are about even that either John put down the milk, or Greg is a frog.
invalid_hypothesis: It is almost certain that either John put down the milk, or Greg is a frog.
hypothesis_assertion: Either John put down the milk, or Greg is a frog.