@CecilyP - You seem unable to understand and reply to specoific issues! That's very tiresome.
Sorry, I thought I had taken specific issues and replied to them as far as I was able. Sorry that you should find it tiresome when I have tried my best.
Of course specifying or measuring literacy is difficult. However there are many pointers, such as exam results, the papers themselves if they are available,
What exams are you thinking about? Until fairly recently, the majority of pupils did not take public exams. Public exams are taken at 16, so only the most able took them when the schools leaving age was 14 or 15. The only public exam that most will have taken is the 11+ but I doubt if children's scripts have ever been released for public perusal.
comments made on difficulties in form-filling, what books and papers people actually bought, the number of remedial institutions, examination of things written by people, examples of incomprehension, and so on. The claim being made by McN & AC is that there was a dramatic fall in literacy, and they provide various examples of evidence, though they have no really sound overview (in my opinion).
Problems with form filling may be as much to do with the forms themselves as the people completing them. Have you tried the passport form recently? We can all give examples of people with low literacy but unless we make a comprehensive study, we can't really make any convincing claims.
You don't seem able to understand that education in itself is social engineering, and there must be possibilities for such things as deliberate dumbing-down and deliberate multiplication of makework jobs. The fact that there are dim adults who must count as being able to read is true, but not the point.
Do I need to understand that education is social engineering? It seems totally unlikely that the government in the immediate post-war period needed to produce makework jobs. Also, it is only since the 1980s that the government has taken to micro-managing what goes on in schools with the introduction of the national curriculum etc.
You also seem hopelessly self-contradictory in your attitude to McNee and her dyslexic pupils or patients. If they have been in classes for ten years without learning to read, how can you seriously claim that a few sessions for a short tiem will turn them into fluent readers?
I don't think I am being contradictory, just doing the maths. I haven't read the book that you are referring to, so do not know the age of the children being taught, but being in classes for '10 years' would not have taught children who had fallen behind to read, if those classes involved no focused reading tuition. On the other hand, a weekly or twice weekly one to one, perhaps for a year, would enable considerable progress.