l-icons"></i></a></span> <span class="modifier_kind"><span class="modifier"></span> <span class="kind">def</span></span> <span class="symbol"><span class="name" title="gt4s: $bar$bar">||</span><span class="params">(<span name="that">that: <a href="ExstInducStrucs.html" name="provingground.induction.ExstInducStrucs" id="provingground.induction.ExstInducStrucs" class="extype">ExstInducStrucs</a></span>)</span><span class="result">: <a href="ExstInducStrucs$$OrElse.html" name="provingground.induction.ExstIn