There is enough evidence to believe the account of how various buildings in the World Trade Center collapsed. This includes the failure mode of Building 7 mirroring a major fire in 1 Meridian Plaza at Philadelphia which suffered significant structural damage due to fire; the requirement for major skyscrapers to have fire sprinklers throughout the building came from the 1 Meridian Plaza fire.

I'm only speaking to the affects of the planes hitting the Twin Towers. I can't speak to the accuracy of anything happening beforehand to the attack, but the damage of the attack follows how these buildings would respond to the disaster. This includes Building 7.