ote class="alectryon-goal"><div class="goal-hyps"><span><var>p, q, r</var><span class="hyp-type"><b>: </b><span><span class="kt">Prop</span></span></span></span><br></div><span class="goal-separator"><hr></span><div class="goal-conclusion">p <span class="bp">‚àß</span> q <span class="bp">‚Üí</span> q <span class="bp">‚àß</span> p</div></blockquote><div class="alectryon-extra-goals"><input class="alectryon-extra-goal-toggle" id="literate-lean3-lean-chk6" style="display: none" type="checkbox"><blo