context: It is probably the case that Gertrude is a mouse. Chances are slight that Brian is a swan. There is little chance that Sumit is thirsty. It is probably not the case that if Sumit is thirsty, or Brian is a swan, then Bill went to the kitchen. We doubt that if either Sumit is thirsty, or Gertrude is a mouse, then Sandra dropped the apple. It is highly unlikely that if Brian is a swan, and Gertrude is a mouse, then John moved to the office.
hypothesis: There is a better than even chance that either Sandra dropped the apple, or Gertrude is a mouse.
valid_hypothesis: There is a better than even chance that either Sandra dropped the apple, or Gertrude is a mouse.
invalid_hypothesis: It is improbable that either Sandra dropped the apple, or Gertrude is a mouse.
hypothesis_assertion: Either Sandra dropped the apple, or Gertrude is a mouse.