@unimagine On the one hand this is stupid because being on your phone or computer doesnt mean you arent paying attention.
On the other hand if it pisses off politicians and gets them in trouble for stupid shit maybe it will get them to hate facial recognition and start taking it seriously... so maybe its stupid in the most brilliant of ways...
Its not just that. Multitasking, if you learn to do it right, greatly improves your output, and its kinda obvious why. Any one task is going to have micro-blockers. For example if your programming then you have periods where you wait for it to compile or a big download, in a lecture there may be periods of the talk that you already understand, etc.
So by shifting your focus during the micro-blockers to secondary tasks you dont waste idle time focusing on just one thing just for the sake of it. Moreover, and this is the important part, your subconscious is busy thinking about and working on everything at once. So when you shift back to a task you will almost always find you have a greater understanding than where you left off and the all of a sudden you can see connections and answers you were struggling with before.