There is a very good chance that Brian is a frog. Chances are slight that Daniel left the football. There is little chance that Greg is green. There is a better than even chance that if either Brian is a frog, or Daniel left the football, then Emily is a mouse. It is unlikely that if Greg is green, or Brian is a frog, then Bill went to the office. Chances are slight that if either Greg is green, or Brian is a frog, then Mary discarded the milk.
It is likely that either Daniel left the football, or Bill went to the office.
It is probably not the case that either Daniel left the football, or Bill went to the office.
It is likely that either Daniel left the football, or Bill went to the office.
Either Daniel left the football, or Bill went to the office.