God said to Adam "In the day you eat of it you will surely die".
Read the wording very carefully, “in the day that you eat” The “day” is in reference to when Adam would eat from the tree, it would be a death sentence. Do you agree that death was the sentence for sin? If so, then Adam was created initially to live forever, it was only after he sinned that he was sentenced to physical death. However, when Adam sinned by eating the forbidden fruit, he did die spiritually. You do agree there are two deaths, correct?
Can I prove this with scripture as it is written…no, but I believe that it can be reasonably construed as I have outlined. In addition, there are many, if not most, conservative Bible scholars that believe that Adam was created immortal and only became mortal after his sin.
“but from the tree of the knowledge of good and evil you shall not eat, for in the day that you eat from it you will surely die.”” (Genesis 2:17, NASB95)