There is an easily grasped evidence in the Bible supporting the notion of Lilith. The evidence comes from conflicting commands given to the women of the first and fourth creation accounts regarding what trees they were allowed to eat.
In the first creation account of Adam and a female in Ge 1:29, the verse states that God gave freedom to both the woman and the man to eat the fruit of every tree. All trees were allowed. However, Eve could have never received permission to eat of every tree. It is clear from Ge 2:17 that before Eve was even created, God issued a new command rescinding permission to Adam to eat of every tree. Adam was no longer allowed to eat of the Tree of Knowledge. Thus, at no time did God give permission to both Adam and Eve to eat of every tree. The only way to rectify this contradiction between the first and fourth creation accounts, without resorting to verbal or theological gymnastics, is to conclude that the woman of the first creation account is not the same as Eve, and that the woman of the first account preceded Eve. Only Lilith fulfills this role.