I would be more impressed with that line of debate were it not for the fact that I have seen on more than one occasion (I fly very often for work), presumably-female pax waved through Immigration while wearing the full burqa. I.e., no correlate-visual-identification-with-travel-document at all possible or attempted. Most recent time (couple years ago) escalated politely to my then-MP who escalated it to Wgtn who buried it.
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