ition of at least one indexical
&gt; to pin down the referents of its terms.
&gt; 
&gt; An icon could be used as part of a proposition by combining it with
&gt; an index of some sort.  As an acquaintance of mine once remarked,
&gt; "I can point in any language."  That pointing is an index, which
&gt; is also incapable of stating a proposition by itself, but it
&gt; could be used to state a proposition by combining it with
&gt; icons or sinsigns (i.e., existing objects, which serve
&gt; as signs of themselve