Jehovah God took the man and settles him in the garden of E'den to cultivate it and to take care of it. Jehovah God also gave this command to the man: "From every tree of the garden you may eat to satisfaction. But as for the tree of the knowledge of good and bad, you must not eat from it, for in the day you eat from it you will certainly die." - Ge 2:15-17
Now the serpent was the most cautious (or "shrewdest; craftiest.") of all the wild animals of the field that Jehovah God had made. So it said to the woman: "Did God really say that you must not eat from every tree of the garden?" At this the woman said to the serpent: "We may eat of the fruit of the trees of the garden. but God has said about the fruit of the tree that is in the middle of the garden: 'You must not eat from it, no. you must not touch it; otherwise you will.die.'" - Gen 3:1-5
Does it sound like Adam and Eve lacked comprehension? Are perfect mankind blithering idiots? No, the tree only represented the choice to choose independence and the consequence of getting to know thru experience that God's ultimate choice to choose for them what was good and bad was always in their best interests. Comprehension was not the issue, and in Adam's case, believing God spoke the truth was not an issue. As 1 Ti 2:14 states, "Also Adam was not deceived."