><code><span><span class="keyword">val</span> unknown : <a href="#type-t">t</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-exists_pvar"><a href="#val-exists_pvar" class="anchor"></a><code><span><span class="keyword">val</span> exists_pvar : <span><span class="label">f</span>:<span>(<span><a href="../../../IR/Pvar/index.html#type-t">IR.Pvar.t</a> <span class="arrow">&#45;&gt;</span></span> bool)</span> <span class="arrow">&#45;&gt;</span></span> <span><a href="#t