NIST does initiation (wrongly). ROOSD is a collapse progression mechanism.
WIth the information of the north wall, south wall, west wall, tilt and early antenna and northwest corner movement, it is not hard to see why the NIST initiation scenario is wrong.
But first you have to know what the NIST scenario is for WTC1. It is just a "copy-paste" version of the WTC2 failure scenario with a south wall failure instead of an east wall failure.
But this time you need a south wall that looks just like a core failure with almost no tilt.
The NIST solution? Ignore the minimal tilt, ignore the early antenna movement, ignore the fact that the north, west and south walls fail with upper wall failing out and over the lower wall and call it a south wall failure anyway. They then overestimate the tilt and assume you are too gullible to notice.
Your solution to the contradictions? Ignore them and believe NIST. Pretty scientific.
What about R Mackey's solution? Make up a south wall tilt. Pretend it happened anyway. That was his solutiopn of the Hardfire program: Make an imaginary building that tilts, call it WTC1 and hope you are too gullible to notice.
Problem solved.