It can also be raised upstairs in the library with the "browse the bookshelves" action. I think I'll also lower the skillcheck requirement for the next update.
Thank you. I was about to suggest reading as a way to gain intellectual stimulation because I didn't know about it, but yeah. Also, I've seen the other update, which is the 'Play game' under the Internet section by the dorm. Maybe it would be also possible to gain a small amount of intellectual growth by playing educational games. Or even by simply engaging with others- like a discussion (still waiting for the availability to move dorms/apartment ;p(I know it would be a few decades from now))