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" Consciousness surely did not, James said, suddenly irrupt into the universe fully formed. The history of life is a history of intermediates, shadings-off, and gray areas. Much about the mind lends itself to a treatment in those terms. Perception, action, memory—all those things creep into existence from precursors and partial cases. Suppose someone asks: Do bacteria really perceive their environment? Do bees really remember what has happened? These are not questions that have good yes-or-no answers. There’s a smooth transition from minimal kinds of sensitivity to the world to more elaborate kinds, and no reason to think in terms of sharp divides. "
― Peter Godfrey-Smith , Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness
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" Why don’t we all live for a longer time? On mountainsides in California and Nevada there are pine trees that were alive when Julius Caesar was wandering around Rome. Why do some organisms live for dozens, hundreds, or thousands of years while others, in the natural course of events, do not see even a single year pass? Death from accident or infectious disease is no puzzle; the puzzle is death from “old age.” Why, after living for a time, do we fall apart? This question is always lurking as the birthdays pass, but the short lives of the cephalopods make it vivid. Why do we age? "
― Peter Godfrey-Smith , Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness