... he wrote a separate work in refutation of the Epicurean Zeno of Sidon, who had objected to the very beginnings of the "Elements" on the ground that they contained unproved assumptions.
... siya wrote isang hiwalay na trabaho sa pagpapabulaan ng maluho Zeno ng Sidon, na objected sa tunay masimulan ang "Sangkap" sa lupa na sila na unproved assumptions.