Surely admiting it means you're not a false prophet? Cos you have recanted what you said before, whereas just changing what you said before without admitting you have changed is deceit, and hoping no-one will notice you were wrong.
When I studied law at Uny it was the first time I was exposed to having to quote all my references accurately, and it realised just how many vague things were said in the Witchtower without a reference to back it up e.g. 'many religious leaders' etc etc - how many?, which ones exactly?, author, title, page number and publisher? You would never pass an assignment with those kinds of vague statements.
Sad thing is I started writing my assignments in Witchtower speak, and soon got picked up on such sloppy bogus academia.