If it is your opinion that Eve had NO knowledge of good or evil whatsoever, then why does the next few verses say:

Genesis 3:6
6 When the woman saw that the fruit of the tree was good for food and pleasing to the eye, and also desirable for gaining wisdom, she took some and ate it.

Eve knew:

1. the tree was "GOOD for food"
2. GOOD to look at ("pleasing to the eye")
3. GOOD for gaining knowledge ("desirable for gaining wisdom").

Clearly, there are at least three ways that Eve knew that something was "good"; thus, we can see that she did have some basic understanding of "good" and "evil" and from this alone she should have been able to grasp that disobeying God was NOT good - especially in light of His warning that they would die if they ate of that tree.

This is just another attempt to make God a moral monster by blaming Him for our human failings.