Distinguishing between inclusive or and exclusive or in logic is useful. Is there already an ascribed way of using each of these operators in everyday speech in English?
I agree with McCawley that the English "or" is always inclusive. Sometimes extraneous circumstances make the "both" interpretation unreasonable, giving the false impression that there is an exclusive sense. I think that argument is probably in McCawley's book What linguists always wanted to know about logic, but were afraid to ask.