 Creedal orthodoxy requires 1–3 and 5, yet 1–3 imply the unorthodox 4, and 1, 2 and 5 imply the unorthodox (and necessarily false) statement 6. So what to do? Lines 1–4 seem perfectly clear, and the inference from 1–3 to 4 seems valid. So too does the inference from 1, 2, and 5 to 6. Why should 6 be thought impossible? The idea is that whatever its precise meaning, “generation” is some sort of causing or originating, something in principle nothing can do to itself. One would expect Leftow, as a one-self trinitarian, to deny 1 and 2, on the grounds that neither Father nor Son are identical to the one self which is God, but rather, each is a mode of God. But Leftow instead argues that premises 1 and 2 are unclear, and that depending on how they are understood, the argument will either be sound but not heretical, or unsound because it is invalid, 4 not following from 1–3, and 6 not following from 1, 2, and 5.