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Furthermore, we have been told over and over again that any measures carriers might implement — temperature sensors, for example — simply don’t work. “The positive predictive value of screening is essentially zero,” the authors of a widely cited 2005 study reported, based on Canadian airports’ experience with thermal scanners during the 2003 SARS outbreak.

One of the authors of that study was Theresa Tam, who is now Canada’s Chief Public Health Officer. She’s the one doling out all the science that Trudeau insists underpins every single decision he and his ministers make: “Our focus every step of the way is doing what (is) necessary at every moment based on the recommendations of experts, based on science and doing what we can to keep Canadians safe,” the prime minister said Monday.

It’s more than a bit awkward — but not as awkward as federal Health Minister Patty Hajdu’s immortal March 13th dismissal of travel restrictions: “Canadians think we can stop this at the border, but what we see is a global pandemic, meaning that border measures actually are highly ineffective and in some cases can create harm.” Five days later, the border slammed shut.

We are to believe all of the positions above were supported by the same scientific experts. That doesn’t make sense. Clearly the experts supported the more lenient measures, and then politics intervened.