# Two Visual Systems and the Feeling of Presence **Opening (not a real abstract):** Two Visual Systems and the Feeling of Presence Mohan Matthen When I look down at my hands right now, it looks as if they are working on a black computer keyboard. There is something about my visual state that makes it seem as if the keyboard is really there, and that it is really black. My visual state would be inaccurate, or false, if this were not the case. When I am relaxing in an armchair, I can close my eyes and summon up a fairly detailed and vivid image of my hands on a black keyboard. This state of visual imaging is different from my present visual state. It does not make it seem as if the keyboard is really there, nor that it ever was, or that it is really black. I could just as well summon up an image of my hands playing on a piano: I know I never did play the piano; hence, it is immaterial, as far as the veracity of this image is concerned, **Authors:** [[Matthen]]