to true</a></li></ul></nav><div class="odoc-content"><div class="odoc-spec"><div class="spec value" id="val-atom_negate" class="anchored"><a href="#val-atom_negate" class="anchor"></a><code><span><span class="keyword">val</span> atom_negate : <span><a href="../../IR/Tenv/index.html#type-t">IR.Tenv.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="../Predicates/index.html#type-atom">Predicates.atom</a> <span class="arrow">&#45;&gt;</span></span> <a href="../Predicates/index.html#type-atom">Pre