--------------------------------------o
| Disjunctive Subject &quot;S&quot; and Inductive Rule &quot;M =&gt; P&quot;       |
o-----------------------------------------------------------o

I got as far as sketching a few readings of the penultimate sentence:

| Hence the first premiss amounts to saying that
| &quot;S_1, S_2, S_3, and S_4&quot; is an index of M.

Uncertain as my comprehension remains at this point, I will
have to leave it in suspension for the time being.  But let
me make an initial pass at t