Well, that's interesting. All of those do present different levels of engagement though. The phone - only voice and no facial or body queues. Novels - obviously no audio and no opportunity to engage, and comic books - less use of imagination required than a novel. Television being the most like real-life, most stimulating as actually watching something in the real-world ... designed to be more engaging visually and with sound than stimulating with interesting thought (most of time - entertainment vs educational/learning). Writing too, perhaps if people you learned the most from and listened to the most from were very well-spoken - and perhaps Socrates understood the value of the listeners/readers being present for engagement, whereby if someone doesn't understand a point or wants to challenge it, they can instantly. It does seem like all of these evolutions and innovations of humanity and language, communication, are making the natural world a less healthy place.