It is highly likely that Lily is a lion. It is probably not the case that Daniel is in the garden. It is certain that Greg is a frog. Chances are about even that if either Lily is a lion, or Greg is a frog, then John left the football. We doubt that if Daniel is in the garden, and Greg is a frog, then Yann is thirsty. It is improbable that if Lily is a lion, and Greg is a frog, then Brian is yellow.
It is certain that either John left the football, or Brian is yellow.
Chances are slight that either John left the football, or Brian is yellow.
It is certain that either John left the football, or Brian is yellow.
Either John left the football, or Brian is yellow.