If we could figure out how to recreate or "spark" a sense when, physically, there is no reason for it to occur, wouldn't we then be able to create fully simulated worlds and live in them? And wouldn't that be grand? To clarify: think of a fire. You can look at it and you see it, in a dark room. You can touch it and it is hot. You can smell it and (I dont know how it'd smell). You can hear it cracking. These messages are sent from our sensory organs to our brain and then our concious mind senses them. But is it possible to sense this fire, without it being there? Effectively what I mean to say, could we trick our brain and conciousness and senses into experiencing a whole new world?