Foundation
Paradox and the Last Digit
The
Foundation Paradox comes in various flavors, including the First Cause and the
Munchausen Trilemma. To wit:
The First Cause:
Either:
the chain of causation goes back infinitely, and there is no first cause;
Or:
there is a first cause, itself uncaused;
Or;
there is a first cause, caused by another cause, itself caused by the first
cause, so causation loops.
And
in none of these three cases is causation well-founded.
Munchausen Trilemma:
Any
explanation is either:
infinite
(it goes back forever);
incomplete
(it starts with an unexplained explanation);
or
circular (it loops).
And
none of these are properly explanatory.
These
two are clearly analogous; and they have many variants. (For instance, does the
meaning of life have a meaning?)
The
difficulty is often posed as theological, or scientific; but really the problem
is mathematical. For consider the decimal expansion of a real number. Does it
have a last digit?
Either:
the decimal expansion is infinite, and there is no last digit;
Or:
the decimal expansion terminates with a last digit and nothing but zeros
thereafter;
Or:
the decimal expansion loops in a cycle.
That
is; a real number is either irrational, dyadic rational, or non-dyadic
rational.
In
general a sequence is either infinite or terminating or cyclic. This
uncontroversial mathematical proposition implies theological and philosophical
confusion.
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