Perry Marshall is an online marketing strategist with a background in computer engineering. His new book ‘Evolution 2.0: Breaking the deadlock between Darwin and Design’ claims to show a ‘third way’ which proves evolutionary changes are neither random not accidental but are targeted, adaptive and aware.

PZ Myers is well known as an evolutionary biologist and strident atheist blogger. He believes Marshall’s book is flawed. They debate the mechanics of the cell, how information arises and whether Marshall’s analogies from computer engineering are suitable in the field of biology.