Welcome!Why permissable is not correct spelling?
You have changed the sentence from 'Why is permissable not correct spelling?'Thanks to Mr. Micawber, I now know of this site: Spelling: Suffixes -ible and -able
I find the article to be missing from either sentence, by the way.
Why is this not THE correct spelling.
No, I also consider "spelling" as a noun. Consider this conversation, in explanation of how I read the role of "the".Really? I think it requires the article. I read "spelling" as the noun. You must see it as an activity.