I'm pretty sure some of you probably think this is a pretty stupid question, but I have to ask anyway. I know that the EDIT menu's Duplicate selection is NOT the same thing as instancing, but could someone please tell me what the difference is? For instance, I used duplicate to create this particular scene using Michael 3,and some outfit he had on. I duplicated him up to ten times, along with everything he was wearing and the weapons, and there was still V3 in the scene, several vehicles, a city landscape, and several other props and figures  that can't be seen. To the best of my knowledge, the computer didn't seem too sluggish at all. So what am I missing with Instancing?