Well this is a concept that most people learn by high school. Most people. Let's see if I can put this into terms you'd understand. Soo...you might recall how, upon your 18th birthday, you were adjudicated incompetent. That's pronounced "AD-JOO-DICK-ATED", and, contrary to how it sounds, it has nothing to do with eating dicks. As such you were assigned what's called a legal guardian. This legal guardian has the legal right, and thus as a matter of law is authorized, to make important decisions on your behalf, where you are not. As a matter of law, a judge can't even speak to you directly after this, only your legal guardian, basically as if you aren't even in the room even if you're standing right next to your guardian.
You may recall at some point how your legal guardian was suddenly replaced one day. That's because your first legal guardian spent all of your money on crack. Although he has the right, and therefore authorization, as a matter of law, to spend your money basically however he wants, including paying himself for his services, he still has what's called a duty of care. That's pronounced "DOO-TEE", and it has nothing to do with poop. Think of it like he's your permanent babysitter, even when he's not around. But one day, somebody found you sitting in an empty room by yourself smearing feces all over yourself and a wall while he was in the other room passed out, and...well...one thing sort of lead to another.
A similar concept applies to something the abled people around you call power of attorney, that your legal guardian can also sign on your behalf. Here's one example of what power of attorney grants in at least one jurisdiction ("JUR-ISS-DICK-SHONE", again, no relation to dicks):
https://www.occourts.org/self-...
Notice for example, how power of attorney can grant another person authorization to make financial decisions on your behalf.
As always, you immediately turn to bad faith arguments, just as any MAGA would.
MAGA people aren't able to think for themselves, and there are a lot of them out there. So yes it's true, there are other people out there just like you! You're not alone in this world. Just like them, you're special! Ask your legal guardian if he can take you to a Trump rally, and you'll meet more of your own kind!
You don't have one when you don't meet the other, your argument is merely one of sequence.
Hmm...no. You can authorize other people to act on your behalf, though in your case it's not your decision, it's your legal guardian's decision. As an example, you might notice that abled people around you have something called a credit card. People who have credit cards can authorize other people to use them. They do it all the time, usually without realizing it.