Nescient is an adjective that means lacking knowledge.
The Latin word scire (SHE ray) for knowledge has given us lots of words related to knowledge. There’s science, conscience and omniscience to name a few. And there’s our word of the day, which, combined with ’N E,’ meaning ‘not,’ gives us a word that means ‘lacking knowledge.’
Rob seems to wear his nescience as a badge of honor. It’s as if he’s proud to know nothing.