d for paramodulation, to avoid
unnecessary work.  For example, when paramodulating alpha=beta into
p[into_term], where alpha unifies with into_term, we construct
the appropriate instance of p[beta] in one step by using this routine.
<A NAME="apply_substitute2"></A><HR><PRE><B><A HREF="term.html">Term</A> apply_substitute2(<A HREF="term.html">Term</A> t, <A HREF="term.html">Term</A> beta, <A HREF="unify.html">Context</A> c_from,
		       Ilist into_pos, <A HREF="unify.html">Context</A> c_into);
</B></PRE>Sim