This is my bad - I could have SWORN
I read Guinness coffee stout in this reply
Guys, how do you think does Guinness stout has caffeine? As I know it hasn't, but my friend says that it has...
I mean, I didn't even know Guinness had a coffee stout ... but I did a search and sure enough there it was. It's possible I didn;t have enough caffeine myself when responding to this. Apologies.