Thanks for the advise. I always pretend to focus when I see Sophie's hips have a great deal of philosophy. In any case, the "legal penumbra theory" is the "harp" (no Miss Spelling intended) of Cavalleria Rusticana Macadamia.
Justice William O. Douglas used it in the Supreme Court decision of Griswold vs Connecticut 381 US-479, 85 S. Ct. 1678, 14 L. Ed. 2d 510 (1965).
If you are going for the deduction then you are there with Aristotle. The only outness is Aristotle wants all deductions to boil down to A=B=C or A=B and B=C; therefore, A=C. We can make deductions independent of the syllogism.
Another thing to look at is that Aristotle was using ancient Greek as a metalanguage to explain the syllogism and the obtrusiveness of the subject gets almost insurmountable. It was only in the Middle Ages when the use of symbols was initiated to explain logical statements. Let me propose the historical hypothesis that this innovation facilitated the Church's dominion of the times and the creation of a genius like Aquinas.