For the late Paul Halmos —
Keith Devlin's column is a monthly feature of the Mathematical
Association of America (MAA). This month's column apparently
first appeared online on Tuesday, Feb. 17, 2015. The column
itself, however, is, as of today, dated 12:00 AM Feb. 1, 2015.
It is doubtful whether the professor honored in the column
would approve of this temporal subterfuge.