There are no conclusive theological reasons against SETI, and a signal would support the view that humans are not the pinnacle of evolutionary advance in the universe . Such a detection would discredit the hypothesis that life is the result of a highly improbable random accident. He argues in order to demolish all three. Brandon Carter and Frank Tipler's arguments depends on the formation of life as an exceedinly improbable event. In this respect Davies refers to the lively correspondence between Carl Sagan and Tipler.
Intelligence is a purely chance phenomenon, exceedingly unlikely to arise elsewhere independently.
The contingency thesis strongly depends upon certain philosophical presuppositions. I think what Davies is trying to say here is that both Dawkins and Gould are over reacting against the Argument by Design. Over against Dawkins, Gould and in a sense also Tipler and Carter, Davies enlarges causality with self-organization and spontaneous origins of life and order. The key property of self-organization lies at the edge of chaos, where systems can suddenly and spontaneously create organized complexity with surprising efficiency. Davies thus rejects both explanation by miracles and stupendously improbable molecular accidents.