Every time you go to Amazon.com, you are the subject of a randomized experiment. Every time you search on Google, you are the subject of an experiment. Why not every time a student here does something?Gary King (quoted in Heller, 2013: 85) The structure, the geometry, of the intellectual space called geography has changed and sharply increased in multidimensionality.Peter Gould (1979: 145) The ferment of ideas was fierce; hypotheses were tested, paradigms traded, models proposed, theories suggested, explanations offered, systems simulated, and laws sorely sought after . . . reality was ransacked in search of theory.