Intelligent Design: The Bridge Between Science and Theology is a 1999 book by William A. Dembski which presents an argument in support of intelligent design. Dembski defines the term "specified complexity", and argues that instances of it in nature cannot be explained by Darwinian evolution, but instead are consistent with the intelligent design. He also derives an instance of his self-declared law of conservation of information and uses it to argue against Darwinian evolution.