d that’s really the powerful idea of Lisp. <span class="citation">—<a href="https://ocw.mit.edu/courses/6-001-structure-and-interpretation-of-computer-programs-spring-2005/453216e53b2225221a756bf42bfdcd3d_PEwZL3H2oKg.pdf#page=17" title="SICP Lecture 3A transcript, page 17">Abelson</a></span></p>
</blockquote>
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