The Tree: Trick Trap or Something Else?

Why was the Tree of the Knowledge of Good and Evil placed in the Garden of Eden to begin with if God knew it was going to destroy the innocent pair he had created?

Was God just trying to trick or trap the unsuspecting humans by giving them a test he knew they would not pass? It really seems unfair, doesn't it? But wait, is there another reason the tree could have been in The Garden? A reason that had nothing to do with testing, or tricking, or trapping the first couple? We propose that there is.