C'mon, guys, relax. Dr. Greening is saying -- correctly -- that on its own, the NIST report or any calculation limited to the collapse itself, does not rule out explosives. Provided we compute a collapse is possible, as we do, this doesn't provide any evidence for explosives, either, but it in itself does not rule out explosives.
Rather, explosives are ruled out by the sundry other observations, not the least of which is there was no sign of them before, during, or after, and our calculations make it clear that explosives were unneccessary.
This observation is correct. Strict, pedantic perhaps, but correct.