[net.nlang] Infinity Clarified

dmy (01/29/83)

The various "orders of infinity" are called TRANSFINITE numbers, not
TRANSCENDENTAL numbers.  Those are something else.

And it is only in the realm of mathematics that it is proper to speak of
infinity without qualifying the term as "potential infinity" or "actual
infinity".  In mathematics, infinity is carefully defined.  Outside of
mathematics, one can speak of things as being potentially infinite (such as the
size of the universe, or the human capacity for knowledge) in the sense that
these things have no inherent, pre-determined limit; but nothing can be
actually infinite -- that so-called concept is self-contradictory.  Actual
"quantities", that can be described in words, such as "the number of grains of
sand on all the beaches in the world" or "the total number of atoms in the
universe" or "the total number of legal tournament chess games" are all
finite.  Potential quantities, such as "the total number of sub-atomic
particles of any granularity, currently known or that will ever be discovered"
or "the total number of chess games that COULD be played if repeated positions
are ignored" may be infinite, but only in the "potential" sense -- their
"infiniteness" can never be "achieved in reality".  Consider that "infinite"
means "without end" or "without completion".

And any time that anything is defined or described as having some quality or
property in "infinite measure", where this is intended to be meant in the
"actual" sense, it is either a case of poetic license, or an error -- the thing
doesn't have that property, or it doesn't exist.

--dmy-- (David Yablon, 82/1/29, No.Virg.)