What's the difference between a post and an article?

Yesterday I asked a question on Twitter. Today I'm still thinking about it.

I asked, What's the difference between a post and an article?

And here are the responses I got:

@fairminder (Jim Spencer of JBSPartners): research, focus, length, accuracy, supporting evidence, editing, revising, proof reading and sometimes a second pair of eyes

@LewisG (of bizsolutionsplus): Isn't a post something we place on a blog, often much shorter than an article which we find in traditional media or perhaps web site

@dJdU (Rich Hilliard): articles are forever, posts last only for the lifetime of their "container" (usually someone else's article)?

@jackhodgson (Jack Hodgson): good question. or "message" for that matter?


I asked the question because I had generally thought of posts as relating to blogs or online media and articles as relating to print or more traditional media forms. But sometime yesterday I found myself reading an piece online and I thought to myself, "this article is really interesting." I caught myself then wondering if this piece was also in print or if the publication was online only.

I considered the outlet to be an authority on the matter I was reading. So now I'm wondering if the answer is more subjective. Does the post / article distinction have less to do with the location of publication and more to do with the pub's authority or credibility?

What do you think?