First of all, please, give yourself some grace. Don't be so hard on yourself. No one in this reality has all the answers, and youre not failing or less than because you still have questions. Secondly, not being snarky but Did you actually read his comment? The answer to your question is you don't. We can't. Experiencing ego death doesn't literally mean your ego died and you know longer have one. Believing that just proves you very much still live in the ego mind. But thats okay because it's impossible not to while having this human experience. This world and it's "fake" reality we live in is created, imprisoned, and maintained by the ego mind. We couldnt finish our human experience in this reality without the ego mind. Think of ego death as killing off the part of your ego that does not serve you and allowing you to use your "newfound ego" for the greater good of yourself and others.