se <code>actual-value</code> on the predicate:</li>
</ul>
<pre><code class="codeblock">(<span class="kw">define</span> (eval-if exp env)
  (<span class="kw">if</span> (true? (actual-value (if-predicate exp) env))
      (<span class="fu">eval</span> (if-consequent exp) env)
      (<span class="fu">eval</span> (if-alternative exp) env)))</code></pre>
<h3 id="4.2.2.2" class="anchor">
<a class="anchor__link link" href="#4.2.2.2" aria-hidden="true">#</a> Representing thunks
</h3>
<ul>
<li>To force a thunk, we ev