context: It is highly unlikely that Sandra left the apple. It is highly unlikely that Bernhard is white. There is a better than even chance that Mary went to the garden. There is little chance that if Sandra left the apple, or Bernhard is white, then John got the apple. There is almost no chance that if either Bernhard is white, or Sandra left the apple, then Bill moved to the office. Chances are slight that if Bernhard is white, and Mary went to the garden, then Julius is a swan.
hypothesis: It is impossible that julius is a swan, and John got the apple.
valid_hypothesis: It is impossible that julius is a swan, and John got the apple.
invalid_hypothesis: It is probably the case that julius is a swan, and John got the apple.
hypothesis_assertion: Julius is a swan, and John got the apple.