How about when you are sitting at third base, or next to third base, and the dealer hits first base but his hands cover the hit from where you are sitting so that you don't know what the hit card is? The hit busts the player at first base, and so the dealer removes his cards quickly still without revealing to your eyes the value of the hit. In fact it is super fast and takes place almost in one continuous motion.
There is some heat, so you don't want to ask the dealer what the bust card was.
If you remember that the player's first two cards were 10/6, do you count the bust card as a 10 for counting purposes, since there are approx. 4 chances to 1 that it is a 10? Or, do you ignore the bust card, since you don't know for sure?
IF you would count it as 10 above, would you also do so if you knew the player at first base had a 15? A 14? Note: You are counting 2,3,4,5,6,7 as +1 and TJQKA as -1 in your unbalanced counting system (KO). Would it make a difference if you were using HiLo?