No need to get hostile. You've made an unsubstantiated claim, I'm asking for some proof of which there's still none. Remember, I tried the exact same test with the login as you, and couldn't reproduce.

Like I said, there's a number of reasonable reasons why your account didn't get deleted, all of them pass the Occam's Razor test a little better than "Facebook just didn't delete my account/is not deleting accounts in secret".

You're making a statement which, if true, is huge -- that Facebook is secretly retaining accounts after deletion, despite multiple credible sources (IE: TIME) running detailed articles to the contrary. On top of that your anecdotal evidence is contradicted by my anecdotal evidence. So I hope you understand if I don't take this at face-value.