context: It is highly unlikely that Greg is white. Chances are slight that Sandra got the apple. It is certain that John moved to the garden. There is a better than even chance that if Sandra got the apple, and Greg is white, then Bill went to the kitchen. It is impossible that if either Sandra got the apple, or John moved to the garden, then Bernhard is gray. It is probable that if Greg is white, and John moved to the garden, then Brian is green.
hypothesis: It is probably the case that either Bernhard is gray, or Brian is green.
valid_hypothesis: It is highly unlikely that either Bernhard is gray, or Brian is green.
invalid_hypothesis: It is probably the case that either Bernhard is gray, or Brian is green.
hypothesis_assertion: Either Bernhard is gray, or Brian is green.