Well on bricks and inventing fired bricks he was probably incorrect as they were the "bricklaying caste" in Pharaonic Egypt 2000 years prior, so they had plenty of opportunity and time.
But to be serious for a moment, the idea of fired bricks was very ancient, it just wasn't practical for economic and fuel reasons for it to become "substantial" in building
What a waste of time that Quanda episode was, sheesh!