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  "body": "\n## Summary\n\nHuntington's axioms are a short system of axioms for [[Boolean algebras|0XADJKM699]] in terms of one binary operation $+$ and one unary operation $n$.\nBesides commutativity and associativity of $+$, they need only Huntington's equation $n(n(x) + y) + n(n(x) + n(y)) = x$.\nEdward Huntington gave this system in 1933, after an earlier set of postulates from 1904.\nThe question whether Huntington's equation can be replaced by a similar equation of Herbert Robbins became the [[Robbins conjecture|X74S395RZD]].\n\n## Explanations\n\n### L1 human\n\nRead $+$ as \"or\" and $n$ as \"not\".\nThen Huntington's equation says: \"($x$ and not $y$) or ($x$ and $y$)\" is the same as $x$, written with \"or\" and \"not\" only.\nIt is surprising that this single law, together with the rules for reordering and regrouping \"or\", already gives all of Boolean algebra.\n",
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