Split those eights.
This is one of those questions that arise only when I'm playing or dreaming about playing, and make me feel stupid for not instinctively knowing the answer.
Usually I don't think of 8-8 as being 16, anyway, so surrender would not creep into my brain.
If I split the eights, I avoid the 16 situation entirely, so surrender isn't an issue. The hand really isn't a 16 at all.
It's better to avoid thinking of pairs as hard hands. 8-8 differs completely from hard 16 -- it's another sort of animal.
These kinds of questions are welcome here, in my opinion.