Which shows another inner-mind distinction, because some people hear voices when they read. I don't, with the exception of some rich dialogue.
In general this is true of the fastest readers (this has been studied I believe), and what's interesting is how recent this is, the normal medieval fashion was to read out loud (at least moving lips and muttering) and those who were able to read without doing this were considered spooky.
The ability to read silently being uncommon until recent times makes the idea of the inner dialogue switching on at some point more thinkable, for me. I wonder if there was a point where people spoke to themselves out loud to reason verbally.
Reading aloud was taught as the proper way to learn the medieval Trivium of grammar, logic and rhetoric, especially grammar and rhetoric. It was effective, perhaps as a mnemonic device. But it was how the Trivium was taught and learned and why reading aloud was the norm during the medieval period.
In general this is true of the fastest readers (this has been studied I believe), and what's interesting is how recent this is, the normal medieval fashion was to read out loud (at least moving lips and muttering) and those who were able to read without doing this were considered spooky.