Old_Geezer - // He made no claim that on seeing the face he woukd be able to tell, but presumably if it isn't a young mother one might think he'd be suspicious.
There's a need to follow logically to reach a conclusion. //
Since the driver would have heard the passenger speak it would already be clear that she is a young woman, and not a burly bloke, so what else in his understanding would be enhanced by seeing her face, in the simple transaction of giving her a ticket, taking her fare, and driving his bus, which is actually what he is required to do?
Oh yes, as I advised previously, if he can see her face, he can tell if she is a terrorist or not!!