If one loses the ability to read, can one still write?

How will they know what they’re writing?

Yes, often. Oliver Sacks writes about it:

”...this is common – in fact, almost universal in this condition. There’s even a Greek name for it in people, called alexia sine agrafia, lost of ability to read but not of ability to write. He can write fluently, but he can’t read his own writing.” (from this interview)

If the injury only affects the eyesight, then i think yes. I can write with my eyes closed.

Yes, just because the brain is dead, you can’t take the writing out of one writer. Unless they were in a coma…that is a differen’t story. I was going to post what @thorninmud said, but he was first.

In the early days of printing, an ability to read was not necessarily a skill required by the typesetter. All he needed was to distinguish a set of symbols. And by the way, Nigel Bolland (sociology lecturer and author) reports in one of this books a census that noted a number of people who could write but not read.

That would be no. If they know what they are writing then this means they can read too. Reading and writing go hand in hand.

I don’t know. With a brain injury no one can guarantee how much was affected. Therefore it differs from case to case.

Well, if they are born with the disability, then they can listen to how a letteror word is made, and gradually learn how to write. If they had just gotten the disability, then I think things would be different, but they still knew how to write.