God's injustice towards Adam and Eve

[John V]

Presumably, until the serpent came along the only commands they received were from god. Thus, there isn't any reason to think that they needed to be able to discern right and wrong; god determines what is right and wrong. All they needed to do was obey.

The serpent didn't order them to do anything. This completely undermines your theory that they were just used to obeying and so obeyed the serpent.

I am assuming that she convinced him, but you're right-- the account simply states that she gave him the fruit and he ate, as he confirms when god questions him. That is more in line with him being used to doing as he is told and not needing convincing.

Likewise, Eve didn't tell Adam to eat the fruit. This is twice that you've read in orders that aren't there.

The line in the NT makes me wonder. What did Adam know that Eve did not?

She presumably had all the intellectual knowledge that Adam had. I would suppose that Adam filled her in on all the things that had happened to him before she was created. But, she didn't experience certain things as Adam had.

The story only tells us that she gave him of the fruit and he ate. Paul claims that Adam was not deceived, but the account gives no detail. And Adam and Eve are equally judged and punished, so did it matter that one was deceived and the other was not?

I don't know that it's equal. Paul also says that sin entered the world through Adam, even though Eve ate first. It seems that Adam, not being deceived, was guilty of the greater sin.

If it didn't, then I think it reinforces the point that unwavering obedience was the key, not whether they understood the magnitude of their actions or not.

Again, neither the serpent nor Eve gave orders to be obeyed, so you can't explain it as them just being used to following orders.

Further, they were only given one command from God - not to eat from that tree. They weren't in the habit of obeying orders all the time, as they just weren't receiving orders, except for one.