Let us calculate.
Calculemus.

Philosophers
Gottfried Wilhelm Leibniz
Born 1646 in Leipzig, Leibniz was the last of the great rationalists alongside Descartes and Spinoza. He wrote the Monadology and Theodicy, discovered calculus independently of Newton (giving us d and the integral.
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Source: De Arte Combinatoria (1666), preface mottoVerified