Factualistic
A person who doesn’t just tell you facts, they dump a whole truckload of them on you like it’s a fact hurricane.
My teacher is factualistic. She dropped a truckload of facts on me during a test.
My brother is factualistic. He told me the history of every pencil ever made during our game of chess.
My friend is factualistic. She explained the entire universe to me during a 20-minute break.