Question about 2 prong receptacles. Just had inspection done. Old house has some wiring without ground. 3 prong receptacles were installed but inspector wants to install 2 prong back. What is the code on that matter? Can you have 3 prong with 2 wires. Or maybe I need to install GFCI as a solution? I don't think installing 2 prong is the solution and advantage to new home owners?