context: It is impossible that Fred is in the office. It is highly likely that Julius is a frog. There is almost no chance that Bill dropped the milk. Chances are slight that if Bill dropped the milk, and Julius is a frog, then John got the apple. It is probable that if Julius is a frog, or Bill dropped the milk, then Mary went to the kitchen. It is certain that if Fred is in the office, and Julius is a frog, then Brian is yellow.
hypothesis: There is a better than even chance that mary went to the kitchen, or Bill dropped the milk.
valid_hypothesis: There is a better than even chance that mary went to the kitchen, or Bill dropped the milk.
invalid_hypothesis: It is highly unlikely that mary went to the kitchen, or Bill dropped the milk.
hypothesis_assertion: Mary went to the kitchen, or Bill dropped the milk.