I like the idea, but there might be better ways to go about it. Since so many people experience the text issue, maybe another form of access could be used. I was going to say use music and a song you've never heard and check the accuracy of the lyrics, but people often get those pesky electronic failures. I think the most reliable would be to ask a friendly, helpful DC what the page said or what the lyrics were.

It'd probably also be best, if you were to read, to say the words word for word but try not to think of them or come up with a summary by distracting yourself immediately after reading. In fact it would probably be best to go with Ebbinghaus and use CVC nonsense syllables to really be accurate. Just write them down, making them up as you write. Hide it away, quiz your DCs. That's how I'd do it.