Okay, so I post one little, innocuous post. And then I look at it. And read it out loud. Seriously. Is it "most sincere" or "sincerest"?
The good news? I have a friend who's just as OCD about grammar as I am. So I call her extension and ask, "Which is it, 'most sincere' or 'sincerest'?" And you know what I love about her? She didn't laugh, or go wtf??? We spent 15 minutes on the phone doing research.
And then, of course, we had the discussion about how irregular verbs become regular after years of incorrect usage. (Something I heard on NPR.)
Oh. And our findings? Either is probably acceptable. We couldn't find conclusive proof either way. Besides-I dare you to argue with me about it.