Well, I don't see where disagreement can arise to be honest. Sure, you have people in Emerging Christian movements and others who don't believe that you can understand the Bible (in fact some say that you are arrogant if you believe you understand the Bible). I say, just let the text speak for itself.
Adam and Eve ate of the tree of knowledge of good of evil, thus disobeying God, their eyes were opened and they understood the difference between good and evil, and all since have been born under the curse of sin as a result.
And there are many with this view, I'm for certain not the only one. Again, this is the orthodox Christian belief, this is what the disciples and all the great forefathers of the faith believed.