Hilary Putnam

Goodman taught him first — they later became Harvard colleagues. Carnap and Reichenbach also taught him, Reichenbach supervising his doctorate, while Quine became his mentor and collaborator. Rorty, like Quine another Harvard colleague, also influenced him: Putnam was a friendly critic of Rorty — they had a famous extended debate about pragmatism. He authored a mathematical paper with Smullyan, and visited the university (free of Italian state regulations) Eco ran in San Marino.