Untruthful knowledge. Who said the forbidden fruit was a apple? This is one of the reasons the book of Enoch was removed.
Enoch 31:3-5
[3]Their fragrance was agreeable and powerful, and their appearance both varied and elegant The tree of knowledge also was there, of which if any one eats, he becomes endowed with great wisdom
[4]It was like a species of the tamarind tree, bearing fruit which resembled grapes extremely fine; and its fragrance extended to a considerable distance I exclaimed, How beautiful is this tree, and how delightful is its appearance!
[5]Then holy Raphael, an angel who was with me, answered and said, This is the tree of knowledge, of which thy ancient father and thy aged mother ate, who were before thee; and who, obtaining knowledge, their eyes being opened, and knowing themselves to be naked, were expelled from the garden. (Study to show yourself approved.)