I understand it to be the teaching that Adam and Eve, Cain and Able, Seth, and so on received as they (Adam and Eve) received as they walked with GOD.
Like, how did Able know to do well in his offering and Cain reproved for his. And Noah knew about clean animals at the flood.
This is my reference to transgression. Having a knowledge of the will of God from the beginning and then transgressing from seeking to walk with GOD and transfer that knowledge of Him to the next generation.
I am not trying to correct or argue, I am just trying to share what my reference point is in what I share. I hope that there can be patient and kind responses, as a servant of the LORD is to be Gentle to all and apt to teach.
I would not be here if I did not need some feedback in my faith. We never really know what another person's story is and we could be the one that helps or hurts the situation...