^{(2)}The layman’s aversion to “complicated” fractions is at the basis of many counting
systems other than the decimal (which is just an accident tied to the number of human
fingers). Base-12 for instance, which is still so persistent both in measuring units (hours
in a day, inches in a foot) and in common language (“a dozen”) originates from the
simple fact that 12 happens to be divisible by 2, 3 and 4, which are the most
common number of parts an item is usually split into. Other bases, such
as base-60 and base-360, have emerged from a similar abundance of simple
factors.