e and Whitehead were making is that
&gt; certain triadic relations, especially those that occur in
&gt; perception, signs, and anything that has representation or
&gt; intentionality bound up in it requires (explicitly or
&gt; implicitly) three arguments.  The notions of context and
&gt; situation are particularly dependent on triadic relations.
&gt; 
&gt; Peirce is the one who developed that idea in the greatest
&gt; detail, but many others, including Whitehead made similar
&gt; observations.  To add a bit