Guests @seardsalmon, @mario_gibney, @kcalvinalvinn, @SomsenRuben, and @sanket1729 discuss pruned nodes, utreexo, validation, full nodes, tradeoffs, liquid, soft forks, and utxo set, exploring different nodes, Bloom filters, transaction validation, privacy concerns, benefits of liquid and federated side chains, using federated side chains as test beds, progress on simplicity programming language, Bitcoin meetups, podcast's theme song, BISC and Cypher Punk Pay, and lightweight nodes.