Last week the Rock n Roll Hall of Fame announced the 2021 nominees. I usually start a thread about the nominees. Invariably it degenerates into "Artist X isn't rock n roll," or "Genre R isn't rock." So instead, I'd rather ask these questions directly: What is rock n roll? How is it different than other guitar based popular music genres? Is it the same as rock music? If not, how does it differ? Is it still alive today? Are there new artists making new rock n roll?