exclusive or
An "or" that means one or the other, but not both.
An exclusive "or" claim is true when exactly one of its parts is true and false when both are true or both are false. English usually signals it with words like "but not both" or "either … or … , not both"; logic does not assume it by default.
Examples
"The special comes with soup or salad, not both" uses exclusive or.
"You'll get a refund or a replacement, but not both" uses exclusive or.
See also