An iceberg can be a symbol of our different memory system. There is the cognitive part visible above the water line, capable to rationalize and symbolize, and there is the huge hidden part floating underneath the surface. Implicit memory systems are not visible and have little words, if at all. They describe our emotions and all other body memories including learnt action patterns such as walking, eating with a spoon, or riding a bike. Our survival responses from the autonomic nervous system are implicit, just as our heart rate is not something we need to think about in order to make it pump our blood.
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