I suspect, though, (and I further suspect that this may prove to be an unpopular point of view), that in this particular field of endeavour - flying - what the regulator should be looking for in assessing suitability for the grant of a licence is not simply knowledge measured either by physical prowess or by theoretical subject testing, but mainly aptitude.
Forget all the long words. Someone gets a PPL when they can prove to an examiner that they can fly well enough and have enough basic knowledge not to kill themselves or someone else. And that's as it should be.
