God created Adam, so he must have been perfect. How then, could he have sinned?
Regardless of how much free will he had, if
he chose to sin, he wasn't perfect. (painting by Raphael)
The question
here contains some evident skepticism. In considering it let's approach it from two ways.
First let's look at the nature of the question.
It makes some assumptions. It assumes that Adam was created perfect. Rather one must look at the scriptural text
for the evaluation of the creation of Adam. In Gen. 1:31 it reads, "God saw all that [God] made, and behold, it
was very good." (NASB) so the conclusion that Adam must have been perfect is more propaganda than fact.
But he was made "very good."
The
second approach is for those who believe the story to be allegorical as opposed to true. For those who see it merely
as myth, the question becomes mute, for the purpose is to explain the entry of sin into the world, and the question of Adam's
perfection is only in the context of being made originally sinless, not unable to sin.
In either case, Adam was made sinless, not perfect.