#Practice, not reading, makes perfect. **Read as much as you want about riding a bike - you will still fail the first time.** For anything that’s not an answer and requires physical and mental coordination, tactile or other integrated sensory knowledge, or team management, give the tasks the DC they would still deserve. Otherwise, if he wants skills with that rote knowledge too, RAW has one solution. He can choose to be two levels of a Knowledge Cleric and divinely channel for skill in any talent for 10 minutes twice a day. If he wants to claim he learned all those skills too, he can add background as to why he can only channel skills from his vast repository of knowledge twice a day. Early dementia, maybe? A magical curse?