SN
Up until now, any information gleaned during selection and induction was not given to the College until the trainee actually failed, which is a bit late. i used "can't count" as a sort of catch-all rather than detailing the full gamut of psycho-social problems that beset yer average teenager. These problems, if they are known about, can be dealt with during training if you know about them, rather than simply treating everyone the same and thus failing some poor schmuck who didn't even know he was loud and opinionated until the training review.
I don't think we take anyone who can't actually count - but the standard of mental arithmetic from today's trainees is a lot worse than it used to be...
That'll be our world-class education system then.