This may seem like a silly question, but let me explain this further.
Consider a common stealth situation where the player is hidden from the enemy AI. The AI has vision and hearing and if they either see or hear the player they will move towards the player's last known position. However if the player is behind cover (therefore the enemy cannot see them) and they attack with a silent weapon (therefore the enemy cannot hear them either), how should the enemy react?
Realistically, the enemy should have an idea of the direction from which the attack struck them and therefore start moving in that direction. But I am wondering if this then would be detrimental to taking a stealth as oppose to offensive approach. If the enemy turns around when hit irrespective of whether they were hit with a loud or silent weapon, there is little benefit to using a silent weapon, since the loud ones will have more power anyway. On the other hand, if the enemy simply stands their while being hit several times by a silent pistol, it may make the AI seem a little stupid.
I suppose it comes down to balancing between rewarding stealth gameplay in a stealth game, but not making the AI seem silly at the same time. What should I do to balance this?