?<br>
procedure?</p>
</tt>
<p>
These predicates define the types <em>boolean</em>, <em>pair</em>, <em>symbol</em>, <em>number</em>, <em>char</em> (or <em>character</em>), <em>string</em>, <em>vector</em>, <em>port</em>, and <em>procedure</em>.  The empty list is a special
object of its own type; it satisfies none of the above predicates.
<a name="%_idx_44"></a><a name="%_idx_46"></a><a name="%_idx_48"></a><a name="%_idx_50"></a>
<a name="%_idx_52"></a><a name="%_idx_54"></a><a name="%_idx_56"></a><a name="%