Complex sentence: The philosopher Gilbert Ryle read Schopenhauer's works as a student, but later largely forgot them, only to unwittingly recycle ideas from Schopenhauer in his "The Concept of Mind".
Split into simpler sentences: The philosopher Gilbert Ryle read Schopenhauer's works as a student, but later largely forgot them. He unwittingly recycled ideas from Schopenhauer in his "The Concept of Mind".