Comparisons were made to George Gaylord Simpson's work in "Tempo and Mode in Evolution" (1941). However, Simpson describes the paleontological record as being characterized by predominantly gradual change (which he termed horotely), though he also documented examples of slow (bradytely), and rapid (tachytely) rates of evolution. Punctuated equilibrium and phyletic gradualism are not mutually exclusive, and examples of each have been documented in different lineages. The debate between these two models is often misunderstood by non-scientists, and according to Richard Dawkins has been oversold by the media.