It is backed by physical evidence, and so an explanation derived from it is backed by physical evidence. And so, in the same sense, the NIST hypothesis for the collapse of WTC7 is backed by physical evidence, in the form of measurements of the thermal properties of steel. And this fact, so self-evident as to be obvious to anyone with a scientific or engineering background, and not even considered worth mentioning by NIST because nobody with any relevant knowledge or understanding could possibly be unaware of it, is quite specifically the one you're trying to deny.
RedIbis, your entire position is based on equivocation between "physical evidence" and "physical evidence collected from WTC7". This is clear from the fact that, when asked to choose which of the two you're referring to, you keep changing your mind; you can't get your story straight because you haven't decided what it is.
Dave