<p>marite, the page you linked also has a paragraph stating:</p>
<p>GRE scores: We strongly recommend that you take the GRE exams prior to the last test date in December to ensure that your scores reach us in time. We will accept scores after the deadline, but the late arrival may hurt your chances for early acceptance. We do not require a minimum score on either of the exams. Include a photocopy of your GRE score report, if available; we will insert a copy of the official report in your file when it arrives. We review applications which do not include GRE scores, but please note that competition for admission is keen, and the strongest applications always include GRE scores.</p>
<p>So, post #58 is technically correct in stating that Chicago does not require GRE scores, though it’s clearly they strongly urge applicants to take them.</p>