Intelligent Design is proved by two scientific statements: Einstein's Theory of Relativity, and Occam's Razor. Basically, nothing can come from nothing, without an outside force. Therefore the universe must have been created. Occam's Razor would also prove this theory. "God created the Earth" is much more simple than any alternative. Also, any arguements for the contrary can be labled as free will (We have free will, but God must, to give us true free will, let us decide based on evidence). Also, mind you that we know nothing on the specifics of the Creation. If God willed it, we could have evolved from monocellular organisms, but, importantly, God made the universe, he knows what will happen, and anything that has or will happen has been mandated by him, as are all things happening at this time.