context: It is unlikely that Mary dropped the milk. It is highly likely that Fred went to the hallway. Chances are about even that Daniel is in the office. There is a very good chance that if Fred went to the hallway, or Mary dropped the milk, then Greg is a frog. It is highly unlikely that if either Daniel is in the office, or Fred went to the hallway, then Bernhard is yellow. Chances are slight that if Mary dropped the milk, and Fred went to the hallway, then Julius is gray.
hypothesis: There is almost no chance that greg is a frog, and Julius is gray.
valid_hypothesis: There is almost no chance that greg is a frog, and Julius is gray.
invalid_hypothesis: It is likely that greg is a frog, and Julius is gray.
hypothesis_assertion: Greg is a frog, and Julius is gray.