I suspect an "all-knowing" would have an all-together different idea of what sin is in the first place. It would understand the variables leading up to any single event from the many angles of that person's life going back generations. To that end, sin would just be a behavior, but an all-knowing would recognize that behavior is just the tip of the iceberg.

"Sin"??!! What the Hell are you babbling about?

" Rabbit hole," out here in Australia we'd call it a bloody Wombat burrow, much large, easier to fall into, etc, etc......LOL.

2 Corinthians 5:21 God made him who had no sin to be sin for us, so that in him we might become the righteousness of God.

God is sin. Go and sin and you will then know God and the Masonic lodge secret religion racist devil worshippers will throw you in Jail and make you pay fines, fee and court cost. Sin = crime, sin = fallacy, sin = wrong doing. Sin = existence.

Psalms 51:5 Surely I was sinful at birth, sinful from the time my mother conceived me.

Now, go and be in non-existance with non-existent flying spaghetti monster sky God for ever and ever and you will no longer have to worry about sin or sinning ever again.

Yes, the all knowing would have to be able to have a massive capacity for knowledge of atrocities without the need for action. One of the reasons that a loving all knowing God doesn’t exist. If there is some kind of all knowing God they’re pretty twisted to allow things to happen that are horrendous; especially to the innocent, who are then more likely to go on and perpetuate the abuse they’d be a lot more of early intervention going on if there was really an all knowing God. Synchronistic intervention would be the way forward: you listening up there God?

All knowing, all powerful, omnipotent, and all the like superlatives are so far removed from the truth that they all reek of bullshit.

Reminds me of Piers Anthony's For Love of Evil from the Incarnations of Immortality series.

...and sin is?

All-knowing of the smell of every rabbit's hole. What degree of all-knowing? Totally all-knowing paradox: all-knowing what the smell of every anus is at every moment of every second while knowing how to block the smell therefore not knowing.

I recall as a child asking My mother why there were laws in the bible about having sex with animals, not because I wanted to do it, but because the idea had never even occurred to me until the bible told me I must not do it.
MY religious maniac mother was furious that I asked and then even more furious when I told her how I had found out about it, and then punished me for "misusing" the Bible by which I presume she meant I was not supposed to actually read it.

He knows everything that will happen, and yet is surprised and angry about it over and over again. I think God needs to go on Dr. Phil.

The ultimate voyeur.