No, there is no particular reason. I seem to recall that in an
intermediate version (between 2.4 and 3.1) 'true' was less than 'false'
because the former was created before the latter.

Martin.

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Martin Sch"onert,   Martin.Schoenert@Math.RWTH-Aachen.DE,   +49 241 804551
Lehrstuhl D f"ur Mathematik, Templergraben 64, RWTH, 52056 Aachen, Germany