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(Image attribution: File:Fig.jpg by Fir0002, used under CC-BY-SA)
(I am aware this is almost hopelessly esoteric. I’ll say as a hint that p.m.o readers stand a far better-than-average chance of understanding this; the subset of those readers who are active web developers have an even better chance yet; and the subset of those who have been active since, oh, 19:13 PST today have the best chance of all. If you don’t get it [and who would blame you? 
], I’ll explain fully in the first comment.)