I have learned and now know how to properly do the reductio ad absurdum to valid syllogisms. Even though, I think what I learned was perhaps too far outside the scope of this chapter. During my study, I saw there was a sharp distinction being drawn by Aristotle between ‘demonstrations’ and ‘demonstrating through the impossible’. For some reason, I sensed that I needed to fully understand what these actually meant, before proceeding any further. What ensued was a confusing week in figuring out what exactly I was looking at.
The principles seemed straight forward at first: assume the opposite conclusion, convert the premises if needed, and compare with original syllogism. It seemed easy enough to execute. So, with that in mind I began to write out, and chart different reductio examples from different valid syllogisms. The problem is that I did not realize that the reductio syllogism was structurally inverted. Meaning, that the opposite conclusion was now the new major premise, thus flipping the original order of the premises. I assumed that the premises of reductio syllogism kept the same sequence, but with the opposite conclusion being different. Also, my understanding of what direction the reductio would lead us was completely flawed. I mistakenly thought the reductio would lead us in the direction of imperfection, not back to the perfection of the 1st figure. Lastly, I was not aware that the lesser extreme in the valid syllogism becomes the middle term in the reductio.
All of these things were unbelievably dense, difficult, and confusing to sort out. However, I think I’ve learned a very valuable tool and intellectually grown from the labor I put into it.
EAR