“My problem is that I have been persecuted by an
integer. For seven years this number has followed
me around, has intruded in my most private data,
and has assaulted me from the pages of our most
public journals. This number assumes a variety of
disguises, being sometimes a little larger and
sometimes a little smaller than usual, but never
changing so much as to be unrecognizable. The
persistence with which this number plagues me is
far more than a random accident. There is, to quote
a famous senator, a design behind it, some pattern
governing its appearances. Either there really is
something unusual about the number or else I am
suffering from delusions of persecution.”
George A. Miller, Harvard University, “The magical number seven, plus or
minus two: some limits on our capacity for processing information,” in The
Psychological Review, Vol. 63, No. 2, March 1956.