On Thu, Jan 26, 2006 at 09:34:43AM +0000, Alan Mackenzie wrote:
[...]
> OK, here are my suggestions.  I think they they are both clear enough and
> rigorous enough:
> 
> " car is a built-in function.
>   (car CONS)
> 
>   Return the car of CONS.  If CONS is nil, return nil.
>   The car of a list or a dotted pair is its first element.
> 
>   Error if CONS is not nil and not a cons cell.  See also `car-safe'."

[similar CDR suggestion snipped]

I actually liked your first suggestions better. I know it is
controversial here :-)

Regards
-- tomas