Fisherman : How Eve was instructed not to
eat it is interpretation, the Bible does not actually say but it seems Adam
told her.
Genesis 3:3 has Eve saying to the
snake "God has said, 'YOU must not eat from it, no, YOU must not touch it that YOU do not die.'" Whether or not that is what God said, that is the principle that the judicial committee relied on. I was quoting verbatim from the letter they wrote to her when she appealed the decision to disfellowship her.
I was appalled by the reasoning given and the city overseer to whom I addressed my concerns was appalled that they had written at all, but the decision was upheld on appeal. The issue was not dating an unbeliever, but that she was not scripturally free to marry.