Dmitri Mendeleev's periodic table looks simple, it doesn't strike as if the elements are, in fact, significantly different from one another. But when you dig in and understand that just a 'seemingly insignificant' property of the number of electrons and protons makes for a vast difference in the way each element acts and reacts in proximity to others - you get a taste of how a harmless looking list can hide all the relevant complexity.
Curiously, the root of the problem often remains hidden from both the siloed designers and developers and only becomes apparent when you try to compare and communicate about it. This post is one example of such effort.
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