I'll chip in on this one.
The collapse of the towers
Fact:
Steel performs very poorly in conditions of fire and small steel sections such as those used in the floor trusses can easily fail if not adequately protected.
If steel performs poorly in conditions of fire then alot of steel structures would collapse because of fire. Throughout history steel structures have performed just as designed regardless of size of the fire.
Fact:
The redundancy built in to the design of the buildings allowed for structural damage from a slow moving passenger jet which had dumped most of its fuel. The effect of fire was impossible to model when the towers were designed and could not be included in any meaningful way into the redundancy design
That doesn't support the govt account, that is an example of rhetoric.
Fact:
The towers were constructed from many thousands of individual members, which were welded or bolted together to form a whole. As such, those connections often prove to be the weakest points of a structure and can be the first to fail if the structure is over stressed.
Your first part is a fact the second part is rhetoric. Where are the examples that show that steel connections are the "first to fail" in a fire.
Fact:
Photographic records show significant sagging of the floors in the affected area, causing inward bowing of the external columns and subsequent failure of those columns
Doesn't that contradict your last "fact". Why did all the welding and bolts fail everywhere except where the trusses connected to the outer column. Those bolts stayed so strong that they pulled in huge steel beams and also broke through the concrete slabs while all the other just failed completely.
Fact:
The towers were never designed to remain standing to their full height if the floor assemblies were removed
Building 7 was designed exactly like that. They were able to remove floor assemblies completely in order to accomodate tenants needs.
Fact:
The towers performed remarkably well given the amount of structural damage they experienced, but this damage coupled with the fires ultimately resulted in catastrophic failure.
Not a fact, rhetoric, opinion, but not fact.