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Wiki information Roscellinus:
Roscellinus, also called Roscelin of Compiègne or in Latin Roscellinus Compendiensis and Rucelinus, was a French philosopher and theologian, often regarded as the founder of nominalism.
Guillaume de Champeaux, known in English as William of Champeaux and Latinised to Gulielmus de Campellis, was a French philosopher and theologian. He was born at Champeaux near Melun. After studying under Anselm of Laon and Roscellinus, he taught in...