...consider the following problems: Does the door of your room open from the right or the left? Which is your second longest finger? At a stoplight, is it the red or the green that is on top? How many teeth do you see when brushing your teeth? What letters are associated with what numbers on a telephone dial? If you are in a familiar room, without turning around, write down all the items on the wall just behind you, and then look.\n\n I think you will be surprised how little you can retrospect in consciousness on the supposed images you have stored from so much previous attentive experience. If the familiar door suddenly opened the other way, if another finger suddenly grew longer, if the red light were differently placed, or you had an extra tooth, or the telephone were made differently, or a new window latch had been put on the window behind you, you would know it immediately, showing that you all along 'knew', but not consciously so. Familiar to psychologists, this is the distinction between recognition and recall. What you can consciously recall is a thimbleful to the huge oceans of your actual knowledge.

• consciousness
• experience
• knowledge
• recall
• recognition
• will
• light
• other
• numbers