Evolution depends on energetic phenomena, recombination, mutation to change the genetic makeup of the cell. There are no energetic differences when something valuable is created compared to something invaluable, a more common occurrence. Valuable functionally or in our eyes. However, it was valuable even before Man existed and therefore value is added without energetic differences. What is this value? As Bergson said, it seems to strive upwards. We call the process that detects value for natural selection.
Our thoughts seem to be evolutional in this respect. If random processes account for creativity then a valuable idea is a rare occurrence. The brain somehow selects and reacts for good ideas. I have earlier speculated that the water environment might be necessary for creativity. If it is a random process, however, a computer can do it in a silicon-copper environment provided it can generate and detect value.