Clairvoyin' and tryna catch me hidin' the ring
Tryna catch me hidin' the ring
Tryna catch me hidin' the ring
Tryna catch me hidin' the ring
Tryna catch me hidin' the ring
He resisted the will of Sauron himself for a bit, and even when hurt by him he told him a little as possible. Pippin very intentionally told Sauron nothing of their quest or of Frodo and Sam.
He's a fool, but a fairly intelligent, strong-willed and kind fool.