That's not provable anymore than evolution is provable. They both fail the test of falsifiability. Karl Popper said the key to science is being able to determine if theoretical assumptions are wrong so you can see if they are correct. Neither evolution or intelligent design meet that definition of science. It begs the question of why evolution is true but intelligent design isn't. Neither excludes the other and they are both keys to understanding different aspects of the issue of life on earth.
"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus