Ed Howland wrote:
> Another, related issue, is the lack of  the <=> operator for either
> class. This comes in handy when sorting arrays of booleans or using
> sort_by on a collection returned from activerecord that has a boolean
> attribute.
>
> I know this has been covered in the archives of this list before, but
> I wasn't able to find any definitive answer from Matz or someone else.

The reason, IIRC, was the lack of meaning for true > false, false > 
true, etc.

-Justin