Your colleague Prof. Kerfuffle is using molecular analysis of the actin gene to estimate when the human and chimpanzee species diverged. Prof. Dither is doing the same thing, but he's using differences in the hexokinase gene. At a scientific meeting, you come upon Kerfuffle and Dither screaming at each other because their data suggest very different times for this ancient event. How can you explain this discepancy to them and avoid bloodshed?