[X4U] SuperDupper question

[David Brostoff]

At 8:00 AM -0400 on 3/26/09, Neil Laubenthal wrote:
>Quoting David Brostoff <listaddr at earthlink.net>:
>
>>Of course SuperDuper is a backup program.
>
>Nope . . .it's a cloning program. That isn't to say that a bootable 
>clone of your drive isn't a worthwhile addition to your 
>comprehensive backup strategy . . . it is.
>
>>Software that creates and retains duplicates of each new version of a
>>file, such as Retrospect, are also backup programs. (The makers of
>>Retrospect would like people to believe that programs that create
>>clones are not "true" backup programs, but this is only marketing
>>speak.)
>
>Nope again . . .I think a survey of professional system 
>administrators will tell you that clones aren't backup . . . they're 
>clones. However, non professionals sometimes get lost by the 
>distinction . . .
<snip>

(Sorry to be picking up an old thread--I was traveling and hadn't 
noticed this reply at first.)

Could you please explain in what way a copy (clone) of a hard drive 
is not a backup of that drive?

David