His argument comes down to "Bitcoin can do it, why do you need another coin?"
Because as Satoshi said: "Piling every proof-of-work quorum system in the world into one dataset doesn't scale."
https://bitcointalk.org/index.php?topic=1790.msg28917#msg28917
Regarding Dan´s quest for proof of stake and other things he said "If you do not get it, I do not have time to explain it to you" since we are doing Satoshi quotes now.
You are amazing, thank you!