Yes Tilly, there are several that post to this board that are quick to criticize. One individual that posts here seems to have have a similiar handicap to that which you describe. He has taken a lot of flak because of his writing. However, it appears that he is intelligent, well read and well informed. He attempted to explain his problem some time ago but that was either ignored or disbelieved.

Good luck with your son. He is fortunate to have a mother like you.