Historian David Henige has argued that many population figures are the result of arbitrary formulas selectively applied to numbers from unreliable historical sources. He believes this is a weakness unrecognized by several contributors to the field, and insists there is not sufficient evidence to produce population numbers that have any real meaning. He characterizes the modern trend of high estimates as "pseudo-scientific number-crunching." Henige does not advocate a low population estimate, but argues that the scanty and unreliable nature of the evidence renders broad estimates inevitably suspect, saying "high counters" (as he calls them) have been particularly flagrant in their misuse of sources.