context: Chances are slight that Mary went to the kitchen. It is highly unlikely that Bernhard is green. It is probably the case that Greg is yellow. It is unlikely that if either Greg is yellow, or Bernhard is green, then Brian is a swan. It is certain that if Bernhard is green, or Greg is yellow, then Jeff discarded the apple. It is likely that if Mary went to the kitchen, or Greg is yellow, then Bill dropped the milk.
hypothesis: It is probable that greg is yellow, or Brian is a swan.
valid_hypothesis: It is probable that greg is yellow, or Brian is a swan.
invalid_hypothesis: There is little chance that greg is yellow, or Brian is a swan.
hypothesis_assertion: Greg is yellow, or Brian is a swan.