I'd agree with that example. However, where does post processing stop and it move to being something else? As you say, one you could argue about all day. The end result is what most people will care about, whatever the means of reaching it.
That line is the one that different people have very different views on.
My personal view is that once you take two images and start to blend them together then you are moving away from photography as I personally see it.
Others will move that line one way or the other dependent on their view.
A while back on a photography forum I frequent someone set a challenge to take a picture and post it without any post processing at all, something a lot of people do on here*. As quick as a flash someone came back and asked how he posted raw photographs on the internet, Convert to JPG was the reply. To do that I have to post process was the response. Ok shoot in JPG, Reponse, if I shoot in JPG I can post process in camera by adjusting the camera settings for Portrait, Landscape, White Balance, enhanced saturation, sharpening settings etc. etc.
Just as different film gave different results, different camera settings give different results, the modern camera allows a change of film between shots and doesn't limit you to 32 (or 24 or whatever) at the same settings.
Its an interesting but un-resolvable debate. Very apt for an RL forum.
*Note my later comments
Edited by Padge, 30 May 2013 - 09:05 PM.