[quote=@Spiritblitz]
<Snipped quote by Techspert>

Okay.
[/quote]

This might make it easier: imagine six rooms, all lined up. You can see everyone and shoot through all the walls. You have a target in each room in a slightly different location, and someone in each room you cannot hit under any circumstances. If you shoot even one of your targets, your mission is a success. If you're standing in the last room, do you think you'd be able to make that happen?