I would guess it was Jerk Factor 10-
although if it works like Warp Factors now, at that point I'd be hiring bodyguards, because the opposition has just attempted to reach an infinite level of jerk- hood.
Under the semi- expanded Full Thrust sensor rules, this was a factor in gameplay; damage was not necessarily disclosed (although the damage procedure was obvious enough), you had to scan your opponent to find out what damage he had taken, and that could be jammed or simply not work.
CtA has no proper sensor rules, and while routine damage tends to blur together, how likely are you to forget handing out a vital systems crit? I can't think of any rationale for not admitting to an opponent how much damage I'd taken. Stealth, maybe, but that's an argument waiting to happen.
I have had problems with relatively inexperienced players- one in particular who started off counting down his ship's damage, keeping track of it's current values, and two turns later had no idea how his ships were doing because he had changed procedure half way through the game to adding up how much they had taken. I am fairly certain this was the result of simply not knowing the game, though.