http://www.smbc-comics.com/comic/chew
Alt text
There was a fairly intricate debate on an early version of this posted to bluesky, the contention being over whether OR was sufficient. I think the ORs have it, but XOR is a funnier word, so there.
Bonus panel
Yeah in this instance "yes" would cover both and if you want to answer with either specific then you name them
"fries, thanks, no shake"
"a shake please, yes"
Those all seems clear to me
Edit although if you just answer "yes" the cashier should prolly confirm "both?", if he's a pro.