     <h4 id="signature" class="signature">
      <span class="modifier_kind">
        <span class="modifier"></span>
        <span class="kind">case class</span>
      </span>
      <span class="symbol">
        <span class="name">BooleanSemiring</span><span class="params">()</span><span class="result"> extends <a href="Semiring.html" class="extype" name="com.cra.figaro.algorithm.factored.factors.Semiring">Semiring</a>[<span class="extype" name="scala.Boolean">Boolean</span>] with <span class="extype" name=