|Someone is wrong on the Internet
||[Oct. 13th, 2010|10:22 pm]
Someone is wrong on the Internet. There's a chance it could be me.|
Is in the middle of the day
Is in the middle of the night
Is in the afternoon
Is not in the afternoon
Edit: Context is here.
AM and PM are regions and 12 is a boundary. Two different classes of entity. Boundaries aren't regions, and they don't have to be in regions, especially not the regions they're the boundary of.
(Is the Scotland-England border in Scotland or England? It's safe to say it's in Britain)
Twelve noon is the meridiem, it can be neither ante- nor post-.
Twelve midnight could be taken as *both* post meridiem in the day just past, *and* ante meridiem in the day to come, but to keep consistency with midday, it should probably be taken as neither, instead of both.