You'd be surprised. If there's a scale from 0 to 100, where 100 is "devoted follower of the Beginner's Guide to Arguing Constructively", I think it's possible to have a decent constructive argument with people who are about 30-40 and up. I've certainly done so myself.
If you lead by example, many people will conform the standards of the debate to your tenor. Not all, of course, but that's when you have to know when to quit.
> Which means that, for example, I believe it is simply impossible to have these kind of "constructive arguments" on, say, Twitter, for example.
That was mentioned in the guide :)
> everyone argues from an emotional perspective.
Certainly you'd agree that there's a scale? It's not black and white. I will edit this part to make that more clear.