It is an occupational risk of biologists to claim, towards the end of their careers, that the problems which they have not solved are insoluble.
John Maynard SmithThis argument [that life is too improbable to have arisen by chance] comes up repeatedly: its latest manifestation is Hoyle's discussion of the likelihood of a wind blowing through a junkyard assembling a Boeing 707 [sic]. What is wrong with it? Essentially, it is that no biologist imagines that complex structures arise in a single step.
John Maynard Smith