Hey William thanks for the response, good point. Miller did indeed say, “Perhaps there is something deep and profound behind all these sevens, but I suspect that it is only a pernicious, Pythagorean coincidence.” 7 however did stem from a range of uni-dimensional stimuli, and many modern studies fall around the number, like you mentioned 5+/-2 (3-7). Miller has forever influenced how we understand memory, chunking, and recoding. Readers wanting to learn more should defintely check out this argticle: https://uxdesign.cc/ux-myth-millers-law-the-magical-seven-was-only-an-allegory-6283505f758d