I think, showing that the collapse would have occurred without the need for any of the steel to have MELTED.

I saw that other thread. What was postulated in that thread was that the steel was distorted, and consequently the floor supports slipped off the 'brackets' holding them up, and the floors then pancaked one on top of the other.

With this scenario, the core would have been left standing, rather than the complete collapse that we know happened.