I think you should read that article again and see if 2nd time around you can find anything belittling about it, or indeed if there's anything there which is written in a way which assumes that the reader doesn't have beliefs which do not match reality (given that the whole point of it is to correct the mistaken belief that "low voltage" means 12v....)I think you should look up the Asperger Sally and Ann test. And then try to see it from the point of view of first time posters with a problem outside of their usual field.