Reckon you could give us some idea of the other side? What are the alternative explanations proposed? The passage here (albeit translated) seems pretty unequivocal.
It also doesn't seem that unlikely. I know a fair few adults who mutter to themselves under their breath while reading, never having managed to kick the habit of reading aloud.
It also doesn't seem that unlikely. I know a fair few adults who mutter to themselves under their breath while reading, never having managed to kick the habit of reading aloud.