@MisterMoo What in the world are you talking about? His surname Griffiths is singular so it takes ‘s to make possessive. Some style guides make exceptions for “biblical names”, by which they mean “Jesus” and “Moses”, but that’s dumb.

@gruber @MisterMoo Not that it's the Bible or anything, but you're throwing the AP Stylebook out the window here, my dude.

For singular proper names ending in s: Use only an apostrophe.

@flargh @MisterMoo True, but I’m not a fan of AP Style. It almost always errs on the side of omitting characters, I think from their history as a literal wire service.

https://www.reddit.com/r/grammar/comments/1esvji9/ap_uses_harris_and_walzs_while_ny_times/

@gruber @flargh @MisterMoo AP wants you to omit the Oxford comma, too. ’Nuff said.

@drdrang @gruber @flargh @MisterMoo

That is enough reasons for never looking at the AP style guidelines.

Maybe they wanted reporters to write so unambiguously that it wouldn’t even be necessary.

An Oxford comma is almost always necessary, the grammar issue it solves might not be.