context: It is probable that Bill is in the school. There is a better than even chance that Gertrude is a cat. There is little chance that John left the apple.
hypothesis: It is highly likely that bill is in the school, or Gertrude is a cat.
valid_hypothesis: It is highly likely that bill is in the school, or Gertrude is a cat.
invalid_hypothesis: There is almost no chance that bill is in the school, or Gertrude is a cat.
hypothesis_assertion: Bill is in the school, or Gertrude is a cat.