[Dr. Eckleburg]

It's possible for me to not understand a mechanical event, and yet that event still be predestined by God to occur.

It happens all the time. 8~)

[P-Marlowe]

It's possible for me to not understand a mechanical event, and yet that event still be predestined by God to occur.

It's also possible for you to have done the mistake entirely on your own pursuant to your own free will and yet it was absolutely predestined and pre-ordained to happen not because God CAUSED it to happen, but because God KNEW it was going to happen exactly as it did and he did nothing to interfere or intervene in your personal screw up. Thus while it was predestined, you yourself are entirely to blame and you can't claim that "God made me do it."