Examine those words.
If there are differing choices it is evident that a choice can be made.
I'm sure you believe it, but you will never truly know it.
I would remind you that truths exist and are (by nature) true whether or not an individual knows or believes them to be true.
2 + 2 = 4. A child of one or perhaps two years of age does not know this and has not the capacity to believe it. Is it therefore not true for that child? I contend that it remains true, and the effects of the truth are everywhere effictive upon that very child--mother feeds him twice in the morning and twice at night and the child is fed four times; the child has upon his body two socks, a diaper, and a gown: the child is wearing four items of clothing.
"[S]ince the creation of the world God's invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that men are without excuse."
Romans 1:20
I share these things with you because I believe that you really want to know the truth. The God who gave you life and created and sustains the whole of what is created wants you to know and believe the truth. The whole of what He does--all that exists--is for this purpose: that the world may know.
He was in the world, and the world was made through Him, and the world did not know Him. He came to His own, and His own did not receive Him. But as many as received Him, to them He gave the right to become children of God, to those who believe in His name: who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
John 1
OK, I'll re-phrase it by saying..'how do you know we had a choice?'
Of course physical evidence shows that 2+2=4, whether one believes it or not, but we are not talking about things that can be represented by physical evidence.
I believe in God with no way of proving it, I am not a Christian...you believe in God, with no way of proving it, and you are a Christian...others believe differently, with no way of proving it. This is just the way it is, and probably always will be.