-<para>The <function>sb-ext:truly-the</> operator does what the
-<function>cl:the</> operator does in a more conventional
-implementation of &CommonLisp;, declaring the type of its argument
-without any runtime checks. (Ordinarily in &SBCL;, any type
-declaration is treated as an assertion and checked at runtime.)</para>
+<para>The <function>sb-ext:truly-the</> declares the type of the
+result of the operations, producing its argument; the declaration is
+not checked. In short: don't use it.</para>