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What is human memory?" Manning asked. He gazed at the air as he spoke, as if lecturing an invisible audience - as perhaps he was. "It certainly is not a passive recording mechanism, like a digital disc or a tape. It is more like a story-telling machine. Sensory information is broken down into shards of perception, which are broken down again to be stored as memory fragments. And at night, as the body rests, these fragments are brought out from storage, reassembled and replayed. Each run-through etches them deeper into the brain's neural structure. And each time a memory is rehearsed or recalled it is elaborated. We may add a little, lose a little, tinker with the logic, fill in sections that have faded, perhaps even conflate disparate events. "In extreme cases, we refer to this as confabulation. The brain creates and recreates the past, producing, in the end, a version of events that may bear little resemblance to what actually occurred. To first order, I believe it's true to say that everything I remember is false.
Arthur C. Clarke
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What is human memory?" Manning asked. He gazed at the air as he spoke, as if lecturing an invisible audience - as perhaps he was. "It certainly is not a passive recording mechanism, like a digital disc or a tape. It is more like a story-telling machine. Sensory information is broken down into shards of perception, which are broken down again to be stored as memory fragments. And at night, as the body rests, these fragments are brought out from storage, reassembled and replayed. Each run-through etches them deeper into the brain's neural structure. And each time a memory is rehearsed or recalled it is elaborated. We may add a little, lose a little, tinker with the logic, fill in sections that have faded, perhaps even conflate disparate events. "In extreme cases, we refer to this as confabulation. The brain creates and recreates the past, producing, in the end, a version of events that may bear little resemblance to what actually occurred. To first order, I believe it's true to say that everything I remember is false.

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A typical Celestine will devote a large proportion of their time to passing through the inscribed sectors of the planet studying the writings, either alone or accompanied by companions with whom to share comments. This is a favourite pastime among them, and as they travel towards the boundaries of the inscribed regions they can watch the ongoing work of those Celestines that have been chosen to record their ideas _ tirelessly twisting, pausing to gather energy, then exerting themselves again; painstakingly working the same patch of dust several thousand times over to shape each individual furrow; to capture, symbol by symbol, the knowledge they have contributed to the Celestine corpus. There is great pride and precision, as well as immense labour, in their toil. Before they commence work, the piece of ground that will house the writing will be chosen very carefully for its aspect. Then, the most favourable angle to the light will be calculated, for the orientation of the wording. The language used is of the most poetic and grandiose sort, quite different from the vernacular, and the symbols themselves are embellished with flourishes, extravagances and curlicues that are unique to the creator. Celestines love to observe this work, which constitutes the pinnacle of their art and of their ceaseless thought-endeavours, and embodies their very reason for being.

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The Celestines: A Short Story