I realized this morning that my dad, who definitely now I know acted and re-acted in many ways as though he had ptsd (and hence why I thought my eventual similarities were just me turning in to my father), and who definitely had Criterion A traumas that I knew of, let alone what Idk, I realized he did not act substantially different- not more or less vigilant etc etc- after a man he and another guy who were trying to help blew his brains out in front of him in (our? his?, I do not know, I was not there) kitchen, nor when he almost burned to death in a fire looking for someone else (who was not there and the dumb-ass didn't do roll call; incredibly he pulled a hydraulic door open and survived, got medi-vacced out, Dr said other than 20 years off your life/ adrenaline , and smoke inhalation all good).
Not all traumas cause ptsd, of course, most don't. But he had had many, and then I thought, you can't get ptsd twice, either.