context: It is probably the case that Fred dropped the apple. It is probably the case that Mary got the milk. There is almost no chance that Greg is a lion. It is impossible that if Greg is a lion, and Mary got the milk, then Emily is a sheep. It is highly unlikely that if Fred dropped the apple, and Greg is a lion, then Lily is a rhino. It is probably the case that if Fred dropped the apple, and Mary got the milk, then Brian is green.
hypothesis: It is almost certain that either Greg is a lion, or Brian is green.
valid_hypothesis: It is probably not the case that either Greg is a lion, or Brian is green.
invalid_hypothesis: It is almost certain that either Greg is a lion, or Brian is green.
hypothesis_assertion: Either Greg is a lion, or Brian is green.