randman
they were not intimate with the concept...that's true, and so they lacked knowledge, but that doesn't mean they didn't know it was wrong to disobey God and eat the fruit.
You do know that you have contradicted yourself in this sentence don't you?
To lack knowledge is the same as saying you do not know. So yes , they did
not know that it was wrong to eat the fruit. This does not mean to say they cannot understand the command given to them not to eat the fruit, just that they cannot comprehend the moral issue behind it.
That said they were indeed obeying God as evidenced by Eve's words to the serpent "And the woman said unto the serpent, We may eat of the fruit of the trees of the garden:
But of the fruit of the tree which [is] in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die."
This explains succicntly the reason why the serpent was successful in his deception. Eve had no judgemental ability for the good or bad of her actions and could not form an account of the outcome of her actions.