>"Single, reusable primitives play a disproportionately large aesthetic and practical role in mathematics, engineering, and even biology. Widely known classical examples include the NAND gate (and its dual, Peirce Arrow, logical NOR) for Boolean 0/1 logic [2, 12], the operational amplifier [13] for positive and negative feedback processes, and, more recently, the rectified linear unit (ReLU) ”ramp” activation function [14] in deep learning [15]. We also mention Wolfram’s single axiom [16], K,S combinators from combinatory logic [17, 18], Interaction Combinators [19], and fuzzy versions of the Sheffer stroke [20]. Other wellknown examples are one-instruction set computers (OISC), e.g. SUBLEQ [21], Conway’s FRACTRAN [22] and the Rule 110 cellular automaton [16, 23]."