That is not the cheating part. Read Smith. He said the pump was drawing water from another loop, not the water that went through the reactors. There could only be 3 gpm going through the reactor, whereas 6 gpm was registered at the flow meter. Assuming for a moment that is correct, the hidden pump supplied it. The other pumps could not have.
It would be nice if IH's experts could get together and get their story straight.