This is how it should be!!!
If you can feel more than nothing during the root canal (or any dental work) then you need more anesthetic. Dentists aim to give you as little as possible so it is up to you to let them know if you have any feeling. It can start to wear off too, you'll know and should tell them so they can give you more.
Take earbuds and listen to some music during it. Let the dentist know and they will probably be fine with that.
Edit: Read more of the thread. Don't get high, it can interfere with the anesthetics. Your tolerance to them can be higher as well. If you feel comfortable with it you can talk to your dentist about it.
A conjecture is a problem that is expected to be true but has not been proven. So it remains a theorem because it has already been proven. What they did is to prove it in a new way. New proofs could just be interesting or they could provide a new way to think about other un proven problems.