Precisely!

I deliberately made sure that my face could not be seen to test the system.

There is nothing illegal in that by the way.

Has anyone ever got through IRIS without staring into the camera?

Yet I walked through the e-passport gates concealing my face without challenge?

Of course, I could just believe that this system works because the government tells me it works!

I seems interesting to me that when someone tries to circumvent a system that they suspect doesn't actually work, it only takes a matter of minutes on a Saturday night to be told of course it works!