 It is opening, closing valves, and then checking the resulting pressure on the FTP, right? Right. When I opened the purge valve, I saw the pressure drop on the FTP. Okay. Went to a vacuum. I'm just thinking in the back of my head, I wonder if I can lie to the computer. I want to see if the computer... I wonder what the computer would do, what it would say if you left the FTP out of the canister and ran the test anyway. It wouldn't see any change. At least we'd prove the rationality of the computer. No, it would not. Right? Right.