[cdaven]

> Where do you stop? If you assume Newtonian time, which extends back to minus infinity... well, what caused time to exist at all?

You stop at the uncaused first cause or the unmoved mover, of course.

[Certhas]

In that case, we are not disposing of any principles (as you originally claimed) when we have an uncaused first cause at t = -13.6 Billion years, instead of having at t = - infinity.