Lol. If you say something is simultaneously both before and after (that is, both pre- and post-), you are speaking nonsense; that is, you are being preposterous. The word “preposterous” is a preposterous word.
Accordingly, it is a word that describes itself. Another such word is the word “polysyllabic”.
Of course I understand the origin but my reasoning is that “post” means after and “pre” means before and something the comes before something that comes after is something that comes right now.
"No man but a blockhead ever wrote except for money." Samuel Johnson.
Who am I to begrudge everybody their fun. But, if you look at the meaning of preposterus in Latin the language ithe word was borrowed from: it means "reversed, inverted; perverted, distorted; absurd". While the preposition præ does mean "before", posterus is an adjective meaning "following, next, coming after". Sort of like the English *US?) term "ass-backwards[/i]. The Latin posterius gave us another loanword, posterior, which is the comparative form of posterus.
