[MR4D]

No mention of LATCH theory? (Location, Alphabet, Time, Category, and Hierarchy)

Oddly, no matter how they are organized, their indices will always be a hierarchy (tree).

Personally, I think human brains just have a categorization approach that is built into our brains as hierarchy, so while other methods are definitely useful, they are an add-on, not a replacement.

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Til https://parsonsdesign4.wordpress.com/resources/latch-methods...