Earlier quoted context omitted.
I think you misunderstand what the phrase "for all intents and purposes" means. It doesn't mean "literally, 100% true" it means "for true enough for this argument". What network does your blockchain run on? It still relies on Comcast to get to my house right? Because you want it to run over the Internet? Maybe you're using AT&T? Probably L3 is in there somewhere, but you're still relying on a centralized piece of equ…
xyr point seems to be that your claim that e-mail addresses are decentralized is faulty. No amount of "Well you are not decentralized in your block chain, either." is going to rebut that. Indeed, it actually reinforces the argument that your claim was faulty, by implicitly agreeing to it with a "but neither are you" response. So perhaps you would like to now explain how e-mail addresses are a system without a centre.…
His point. I am a man.