From what I understand is that it falls back on the laws of thermodynamics and how entropy in a closed system only increases. So it attempts to debunk evolution by that it means because evolution indicates a general increase in life forms on earth, through increased genetic variation, which isn't entropy, it must be impossible. The issue is that earth isn't a closed system so it doesn't have to constantly have increasing entropy. We have a constant influx of energy from the sun, so entropy does not have to increase.