Morgoth, I think I understand your reasoning.
My opinion is that knocked out is just a descriptive term, while you think that it's a technical term of the game.
I can try to bring some weight to my interpretation, but i doubt I can make some headway -in rule lawyering terms- : my idea is that there is no "knock out" rule, so I cannot technically disprove it
Anyway,
AB, page 147:
"A Poisoned character is considered to be Wounded. Thus, if an already Poisoned character is wounded once, he falls unconscious as if Wounded twice (likewise, a Wounded character falls unconscious when Poisoned)."
A character wounded twice is reported as unconscious, while there is no trace of "Knocked Out" (on the other hand, I know that absence of proof isn't proof of absence

)
Other than that, I can only add that I don't see the purpose of such a distinction in the game. Then again, my ignorance isn't a proof
