1(a) Either (i) action A is right because God commands that we A, or (ii) God commands that we A because A is right.
(2) If (i) then DCT is false.
(3) If (ii) then DCT is false.
(4) Therefore DCT is false
The Euthyphro dialogue was written by Plato in 340 BC in Euthyphro and Socrates