This is a Necessary Post

Well, it's not really.  What we can say is that it is an existent post and we can then ponder on whether it is possible, necessary or contingent.

We could certainly equivocate in order to claim that it is a necessary post, because the title of it tells us that it is "a Necessary Post" - necessity is in its self-described nature.  But that would not make it necessary, would it?  Or you could rely on my word for it, telling you that it's necessary, but some readers would not be inclined to take my word for it.

And that's only when we know that the post exists.  What about if this was one of those special posts that no-one else can read, because I haven't the right privileges for general access?  Would a philosopher be able to work from the notion that there is a asserted necessary post (or the possibility of a necessary post) to the conclusion that there is an existent necessary post?

It seems to me that she couldn't, at least not without cheating, and that discussions about necessity (or mere contingency) follow existence, rather than the other way around.

Perhaps someone can explain why the attempt to logic something into existence via the presumption of necessity is something more than theatrics?  (see also here)