context: It is probably the case that John went to the garden. It is certain that Lily is a frog. It is impossible that Fred moved to the office. There is a very good chance that if Fred moved to the office, and John went to the garden, then Mary dropped the apple. It is almost certain that if John went to the garden, and Lily is a frog, then Bernhard is yellow. It is probably the case that if John went to the garden, or Fred moved to the office, then Julius is a swan.
hypothesis: It is almost certain that lily is a frog, and Julius is a swan.
valid_hypothesis: Chances are about even that lily is a frog, and Julius is a swan.
invalid_hypothesis: It is almost certain that lily is a frog, and Julius is a swan.
hypothesis_assertion: Lily is a frog, and Julius is a swan.