Obvious flaw not in article
Come on elreg, why no mention about how TCAS actually calculates the collision warning and that this testing was all done on simulation. PTP would need 3 aircraft flying at the target aircraft to get the target to move in their desired direction. It can’t be done from stationary antenna on the ground as the target aircraft would see the others as not moving.
3 aircraft converging on another would be a failure of other systems and protocols and TCAS would be the least if anyone’s worries.