/code></dt><dd><p>Joins two abstract elements. The boolean flag indicates if the join was exact. It is always sound to return false</p></dd></dl><dl><dt class="spec value" id="val-join_list"><a href="#val-join_list" class="anchor"></a><code><span class="keyword">val</span> join_list : <span><a href="index.html#type-t">t</a> list</span> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> * bool</code></dt><dd><p>Joins a list of <code>n</code> abstract elements. May be faster than joining pairwise. The b