urns <code>#t</code>
 if any of <var>condition</var>
's types includes <var>condition-type</var>
eitherdirectlyorasanancestorand
	<code>#f</code>
 otherwise.</p>
<p>It is an error if <var>condition</var>
 is not a condition, or if <var>condition-type</var>
 is not a condition type.</p>
</dd>
<dt><code>(condition-ref </code><var>condition</var>
 <var>field-name</var><code>)</code></dt>
<dd><p><var>Condition</var>
 must be a condition, and <var>field-name</var>
 a symbol.  Moreover, <var>condition</var>
 must