It is unlikely that Julius is gray. It is probably not the case that Julie is in the office. Chances are about even that Greg is a frog.
It is certain that either Greg is a frog, or Julie is in the office.
Chances are about even that either Greg is a frog, or Julie is in the office.
It is certain that either Greg is a frog, or Julie is in the office.
Either Greg is a frog, or Julie is in the office.