The limits are known? How do we know?
We know how much flexibility there is in a specific set of commands. The number of commands exceed 7 in the SAGE engine, I'm quite sure about that.
Given the fact that we can only notice 7 (plus or minus two) things consciusly, is it not impossible to estimate the power of a program? Of course, there are were more people working on the SAGE engine than one, but I still believe that things made by man may exceed man's expectations.
We cannot actually "know" anything we do not consciously observe. (schroedinger's cat for example)
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