Genesis 3:3 - Matthew Poole's English Annotations on the Holy Bible

To wit, in order to the eating of it. Or the touch might be simply forbidden, or she might reasonably understand it to be forbidden in and by the prohibition of eating, because it was an occasion of sin, and therefore to be avoided. For it is not probable that the woman, being not yet corrupted, should knowingly add to God's word, or maliciously insinuate the harshness of the precept. Others read, lest peradventure ye die, as if she doubted of the truth of the threatening; which seems not probable, the woman yet continuing in the state of innocency, and such doubting being evidently sinful; and the Hebrew particle Pen doth not always imply a doubt, as appears from Psalms 2:12 Isaiah 27:3, Isaiah 36:18, compared with 2 Kings 18:3.