Marcin 'Qrczak' Kowalczyk <xxxxxx@knm.org.pl> writes:

> Aubrey Jaffer <xxxxxx@alum.mit.edu> writes:
>
>> So I would prefer the (/ 0. 0.) option because I think it will arise
>> rarely, if ever.
>
> The tradition of Lisp and Scheme is to use the same notation for
> constants in the program source and for the textual representation
> produced by the printer, as much as it's practical (i.e. excluding
> objects which are "active" rather than being pure values).

Aubrey has a point here.  The tradition to which you refer has not
historically included so-called "error objects".