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  4. Gottfried Leibniz
  5. I hold that it is only when we can prove everything we...

I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.

Gottfried Leibniz
Consideration, Prove
Gottfried Wilhelm Leibniz (2015). “Leibniz: Philosophical Essays”, p.1, Hackett Publishing
I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.