I think that w3w is over optimized and suffers from a large number of failure modes that interact poorly with a typical human's memory. For example, it is real

I think that w3w is over optimized and suffers from a large number of failure modes that interact poorly with a typical human's memory. For example, it is really easy to mis-remember and accidentally pluralize or re-order words. Our memories just don't maintain that kind of precision. Yet w3w will happily accept your mis-pluralized word, or re-ordered words, and spit out a location, with no indication that maybe you made a mistake. w3w forces you to remember and use exactly the 3 words they gave and nothing else, without risking a garbage-in-garbage-out scenario. In fairness, they do try to put similar words very far from each other, but unfortunately this only mitigates the risk and doesn't eliminate it. Our design is resilient to these issues in human memory with the geohashphrase. If you re-order words in the phrase, pluralize (or singularize) a word, or even go so far as to change part-of-speech (e.g. noun a verb) then you'll still get back the same geohash. Btw we hope to offer 4-base-word phrases for well populated locations. Those phrases should be easy enough to use in everday situations. Outside of that you can get complete coverage with a 5-base word phrase.