 of the conclusion.

Peirce's analysis of this pattern of abductive argument
can be understood according to the following paraphrase:

 Fact:  S =&gt; P^1,  S =&gt; P^2,  S =&gt; P^3,  S =&gt; P^4.
 Rule:  M =&gt; P^1,  M =&gt; P^2,  M =&gt; P^3,  M =&gt; P^4.
---------------------------------------------------
 Case:  S =&gt; M.

When X =&gt; each of A, B, C, D, ...
then X =&gt; the Greatest Lower Bound (GLB) of A, B, C, D, ..., which is to say,
then X =&gt; the Logical Conjunction, A &amp; B &amp; C &amp;