He believed that God was true even when it seemed that He would take Isaac away at Mt Moriah. And Abraham believed all this without the benefit of the prior example that we have in him. There is only a difference in consequence. The authority to carry it out is granted by God. And do not lead us into temptation, but deliver us from evil.
Sin exists apart from law.
As I understand your view, we can will but God accomplishes what we willed. I will have to read more of what Tipler says to see how he concludes that the person 'mistakenly' believes that they made the decision because I don't see the problem. As I understand your explanation, the experiment is setup to measure the time lag between measuring a potential change in the brain and noting the dot's location on the screen. The result is that the subject says the dot was at a particular point when the decision was made when in fact the dot was at a point 0.35 seconds earlier. I have some questions.