Symptoms of dyslexia fall into "a consistent and recognisable pattern" which can be clearly diagnosed, a spokesperson for a learning difficulty has said.
Dr John Rack, head of research, development and policy, for Dyslexia Action hit out at claims the learning difficulty, which can make reading and numeracy difficult, "lacked educational value".
We don't buy the argument that it is wasteful to try to understand the different reasons why different people struggle.
And for very many, those reasons fall into a consistent and recognisable pattern that it is helpful to call dyslexia.
Helpful for individuals because it makes sense out of past struggles and helpful for teachers who can plan the way they teach to overcome or find ways around the particular blocks that are there.
More top news
One might argue that David Cameron has just given a speech about a problem that doesn't exist and it is definitely one he can't change.
The complex mix of marketing, merchandising and psychology that sees shoppers parting with £360,000 a minute in the UK's shops.
The Black Friday madness got started early with police called to deal with hordes of frenzied bargain-hunters across the UK.