How exactly do you 'test' for that? Proving a negative? If someone is 'normal' on the outside appearance then they can lie. It's reporting of illnesses that stops such deceits and nabs such people on a disability list. As for 'training,' what does that entail? We issue licences at 'of age' years and experience makes one a better driver. Some drivers are better than others. We revoke driver's licences for poor driving skills.

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