 D, to give it a nickneme, "N",
then X =&gt; N.

Most succinctly, the argument can be summarized as follows:

Where N = P^1 &amp; P^2 &amp; P^3 &amp; P^4:

 Fact:  S =&gt; N.
 Rule:  M =&gt; N.
----------------
 Case:  S =&gt; M.

In this abduction, it is the GLB or the Conjunction
of the ostensible predicates that is the operative
predicate of the argument, in other words, the one
that is common to both the Fact and the Rule.

Finally, the reason why one can say that N is an iconic sign
of the object M is 