context: There is a better than even chance that Mary picked up the apple. It is likely that Greg is white. It is almost certain that Bill dropped the milk. We believe that if either Greg is white, or Bill dropped the milk, then Bernhard is yellow. We doubt that if Bill dropped the milk, or Greg is white, then Julius is a lion. Chances are about even that if Greg is white, or Bill dropped the milk, then Brian is a rhino.
hypothesis: It is probably not the case that greg is white, and Brian is a rhino.
valid_hypothesis: It is probably not the case that greg is white, and Brian is a rhino.
invalid_hypothesis: We believe that greg is white, and Brian is a rhino.
hypothesis_assertion: Greg is white, and Brian is a rhino.