Thursday, 13 January 2011

The distinction that makes a difference

Apparently Donald Mackay defined information as the distinction that makes a difference, which is similar to, though less memorable than, Bateson's "The difference that makes a difference".

I can't find it in Mackay's main work on information - "Information, Mechanism and Meaning" (MIT Press 1969) - or any other publications of Mackay's that I've seen so far, though I can believe it accords with his understanding of information.

If anyone knows the origin of the phrase, please let me know.

Update: after private communication with a couple of the authors who had 'quoted' this expression and referenced Mackay, no one has been able to identify the source. It would appear to be a myth!

2 comments:

sjdalf said...

Places that quote this definition all reference `Information, Mechanism and Meaning', so I think it is in that collection.

Google:
Mackay information "distinction that makes a difference"

David Chapman said...

Yes, I know they reference that, but I can't find it in there. I asked one person who'd referenced it, and he was sure it was Mackay but couldn't point to where it was said. A colleague is now even scanning the book, page by page, so we can do an electronic search!