This is the same as saying if he hadn't eaten an apple, then he wouldn't have eaten an apple -- a meaningless tautology.
No, it is saying if he hadn't eaten the apple he'd have been obeying God. God said "you have a choice: eat the apple and defy me, or don't eat the apple and live without sin." Adam ate the apple and demonstrated that he believed he knew a better way than God.
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-Jeff
Rome did not create a great empire by having meetings; they did it by killing all those who opposed them.