Interesting that expert mnemonists (e.g. world memory champions) don't seem to be able translate that into "real-world" achievement (e.g. top execs, creatives, etc). IME insight production does seem to depend on my long-term memory performance. Not sure how to account for this.
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One explanation might be that mnemonists' techniques often emphasize memorizing large sets of relatively detached information. That doesn't match the structure of knowledge I suspect I need in my LTM to produce insights.
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My use of LTM usually feels more like "streaming long-term memory" than like a mnemonist's memory palace enumeration: each day, a few new details and observations, slowly agglomerating over time into something which might notice a coincidence / contradiction / connection.
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This. The kind of memory that you need to form new insights is a combination of breadth, depth, and connectedness and they are lacking the latter.
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I tell ppl that memory systems particularly spatial ones (palace, shelves etc) damage cognition bc the memory system becomes an artefact that itself is an encumbrance for other mental processes.
It's as if you've made a library into an archival system with no room for readers.
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Another explanation may be that mnemonics aren't great for long-term retention. For keyword mnemonics, see figure 4 of Dunlosky et al (below)
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