Uh Terpy i finally found something on you
"And i ain't never seen that one before, here or anywhere else!"
In that sentence, ain't is used impropaly.
It should be: And i have never seen that one before, here or anywhere else!
You didn't find anything. If you had, you'd notice "ain't never"--a clear double negative used for comic effect. In addition, when a careful writer writes in so obviously an incorrect fashion...it's intended for humor in an otherwise dry, crusty post.
If it were stilted, formal writing, it would also be incorrect to start a sentence with a conjunction...a rule I break quite frequently. Also, there is no such word as "impropaly." And ain't ain't standard usage, so how can nonstandard usage be improper, if that is what you meant? Finally, in your so-called correction, you didn't capitalize the proper noun "I."
You ain't never gonna upset Terp over issues like that! Especially since he has semester after semester in linguistics...but I bet many knew that already. Etymology, too. Onward, ho!
Your right! Drat