context: It is highly unlikely that Julius is green. It is certain that Jeff went to the kitchen. It is improbable that John got the apple. It is unlikely that if John got the apple, or Jeff went to the kitchen, then Greg is a swan. It is highly likely that if Jeff went to the kitchen, or John got the apple, then Sandra put down the milk. Chances are slight that if Jeff went to the kitchen, and Julius is green, then Mary dropped the milk.
hypothesis: It is probably not the case that either John got the apple, or Greg is a swan.
valid_hypothesis: It is probably not the case that either John got the apple, or Greg is a swan.
invalid_hypothesis: There is a very good chance that either John got the apple, or Greg is a swan.
hypothesis_assertion: Either John got the apple, or Greg is a swan.