context: It is improbable that Lily is white. There is almost no chance that Greg is a rhino. It is likely that John got the apple. Chances are about even that if either Lily is white, or John got the apple, then Emily is a sheep. We believe that if John got the apple, or Lily is white, then Mary left the milk. It is highly likely that if John got the apple, and Greg is a rhino, then Julius is a swan.
hypothesis: It is probable that either John got the apple, or Greg is a rhino.
valid_hypothesis: It is probable that either John got the apple, or Greg is a rhino.
invalid_hypothesis: It is improbable that either John got the apple, or Greg is a rhino.
hypothesis_assertion: Either John got the apple, or Greg is a rhino.