I cannot answer your question, as I have never seen them used, but I can
make some guesses. In the early days. MS were obsessed with the competition,
especially 123, and built features of them into their products. The
TRUE/FALSE functions could well be as a result of this. In Excel they are
unnecessary AFAICS because tests resolve to True or False anyway, so
something like
=IF(A1=17,
has a True or False alternative action. Similarly, if a cell resolves to
TRUE or FALSE, you don't need to test it, as
IF(A20,
is the same as
IF(A20=TRUE,
--
HTH
RP
(remove nothere from the email address if mailing direct)