I ask because it’s considered common knowledge that you can’t but I regularly have dreams where I continue books I’m reading irl (they usually devolve into naritive nonsense over time and then sometimes to blank pages, but the actual text is definitely deciferable), text messages, computer screens, and road signs, in both lucid and regular dreams. Am I the odd man out or is it actually just something people say?
A technique I’ve used to trigger lucid dreams is by reading. If I read something, look away, and then look back in a dream it will say something different. Then I know I’m dreaming… or they’ve installed digital billboards.