This is a misanalysis.
In particular, it misstates how a blend of numbers usually works. If a vintner blends several very different wines together, ones that have little in common except that each of them has an alcohol content of about 8-16%, the fact that they share this common feature does not mean that the resulting blend has its alcoholic content "inflated into the stratosphere".
This is not how SDI works. It does not blend numbers at all, there are no "ratios" as you suggest. SDI literally adds the numbers from other defensive systems together. Think of a stock index. The Dow Jones reflects the price of every stock in its index added together. Now what would happen to the index if it started adding in IBM five extra times?
What if someone decided to add together the Dow Jones and the S&P indexes to make a new index? Many companies would be counted twice, other companies would be counted once. This would be complete rubbish and it would be mocked.
What if you are an accountant and count dollars from one division and dollars from another division, without realizing that both divisions have counted some of the same things? You would either be fired or you would go to jail, depending on how the result was used.
This is SDI, which is why it has "index" in its name -- it adds together every common defensive system it can get its hand on. It does not massage the result in any way. This is what indexes do. I think you could call the SDI application of indexing, "Poop."
Edited by Doomtints, 10 January 2017 - 11:27 AM.