I'm not a medical expert. The oral fluid testing technology is advanced beyond what you've just suggested as a methodology. Certainly THC, depending on how much you consume, can stay in the blood for 21 days. That's clear. The common rule of thumb is that you can sleep off the cannabis hangover. I'm told by doctors that this is true generally but not always. Rarely, though, is cannabis consumed without alcohol or other drugs. Mr. Stewart, who had his accident at Elk Valley Coal, had to smoke a few marijuana joints before he came to work, he said, because it would take the edge off the cocaine. They often go together.
It's a complicated issue. With regard to the TTC policy, and I'm not an advocate or here as counsel for the TTC, their program does two samples, for privacy and reliability, just like drug testing in—