Always cheerful, always available, he enjoyed long debates with his students during which he would toss out original ideas and propose conjectures, or sketching the lines of a proof.
Palaging masaya, palaging magagamit, masaya siya mahaba debates sa kanyang mga mag-aaral sa panahon na kung saan siya ay pagbali-baligtarin ang mga orihinal na ideya at imungkahi conjectures, o sketching ang linya ng isang patunay.