Touch

3:3 But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die.

The second half of the woman's response, however, does not correspond to earlier verses at all.

First, Adam was commanded not to eat of the tree of knowledge (in 2:16), while in 2:9 the tree of life is "in the midst of the garden".  As it soon becomes clear that we're still talking about the tree of knowledge, apparently it has changed places with the tree of life.  If we are still talking about knowledge, I want to emphasize that there is then no prohibition against eating the tree of life.

Second, there was no prohibition against touching it in 2:16.  Lots of possibilities here.  (1) There was a warning about touching back in the scene recounted in 2:16, but the author chose to leave it out. (2) God added it later.  (3) Adam added it when telling the woman.  (4) The woman added it when telling the serpent. (5) The author added it here for his own reasons.

Why are there discrepancies?  Do they have any significance?  I have no idea.