context: It is certain that Fred left the football. It is probably not the case that Greg is a frog. It is likely that Jessica is a mouse. It is likely that if Greg is a frog, and Jessica is a mouse, then Julie is in the bedroom. It is highly unlikely that if either Greg is a frog, or Fred left the football, then John went to the hallway. It is highly likely that if Fred left the football, and Jessica is a mouse, then Lily is a swan.
hypothesis: It is certain that greg is a frog, or Fred left the football.
valid_hypothesis: It is certain that greg is a frog, or Fred left the football.
invalid_hypothesis: Chances are about even that greg is a frog, or Fred left the football.
hypothesis_assertion: Greg is a frog, or Fred left the football.