"If what we saw were images of things and not the things themselves, there would have to be an internal agent, a man-analogue or homunculus, that could look at the images in order for perception to occur. But this man-analogue could not perceive any images unless it too had an internal homunculus that could perceive images. We have the beginning of an infinite regress." - Anthony Birch "Standard Objections to Mental Images" (http://www.gis.net/~tbirch/mi10.htm)