a complement,
            <code class="computeroutput"><span class="number">1</span> <span class="special">-</span>
            <span class="identifier">p</span></code> we should not even think
            of writing <code class="computeroutput"><span class="identifier">find_scale</span><span class="special">&lt;</span><span class="identifier">normal</span><span class="special">&gt;(</span><span class="identifier">z</span><span class="special">,</span> <span class="number">1</span> <span class="special">-</