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322 pages, Kindle Edition
First published January 1, 2008

When I was a small child, my grandmother was diagnosed with probable Alzheimer's disease. At that time, I hardly knew what the disease was (I thought the word was "Old-Timer's"). For the first year or two of her decline, her symptoms were subtle and I was too young to notice anything unusual. By the time my mom invited my grandmother to come stay with us, however, the disease was in its middle stages, and I was old enough to understand that something was deeply wrong. Just before my grandmother arrived, my mom explained to me what I should expect: cognitively, I was now more advanced than she. Difficult as it was to comprehend, I would now have to think of myself as more mature than my grandmother. I would have to watch out for her, like a brother would for his little sister.
...Chance also created some astoundingly complex and resilient successes, and memory didn't miss a chance to take these opportunities as far as it could. Eventually, with higher domains of complexity, Memory took on new responsibilities. Once Chance and Memory devised the nervous system, for example, Memory found work for itself beyond its endless, monotonous transcription. Chance interred Memory in their mutual creations, allowing, for example, a simple fish to remember not to eat a bluish alga, or swim too close to the coral. Chance encouraged Memory's new work, and in new organisms new forms of memory were invented all the time: instinctual memory, procedural memory, sensory memory, short-term memory.