He has in mind the Taylor rule, which would set the nominal fed funds rate based on a single equation: (alt-m.org)
Supercomputers can store more information than the human brain and can calculate a single equation faster, but even the biggest, fastest supercomputers in the world can not match the overall processing power of the brain. (scientificamerican.com)
Although mathematicians generate the set dot by dot, this is not the same as having a single equation which defines every point. (newscientist.com)