Once Upon a time I decided to try to capture every thought in my mind as it was happening. The reason I did so is that I became enamored by the idea of collecting my thoughts but in a very real way that was external to my mind. So, for what turned out to be for a period of five months, I kept small piles of index cards and a pen in various key places around my house. As each thought occurred to me, I would write or draw them on an index card, with one thought per side of index card. I then would either number them or put a date and time. If several thoughts were occurring simultaneously, I would have 3 or 4 index cards laid out in front of me and I would do my best to capture each thought before they disappeared. In the process, I discovered the length of my short term memory was about four seconds long, with two seconds overlap on either side where a new thought came in or an old thought came out at the same time. I don’t know if I captured every mentally verbal or mentally visual thought, but I did end up with several thousand index cards filled on both sides in the end. I’d hoped to discover what made a thought salient enough to become noticed by my consciousness, but I never did reach that knowledge.

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