[xlnt]

The point is that we don't want duplicate content, even if it's at slightly different URLs.

[boucher]

I think the counter-point was that it may actually be different content. How often that is the case, I don't know, but assuming it will never happen doesn't necessarily seem like a great idea.

[xlnt]

Maybe the system should actually check what's at each page.

And you should read more carefully. I did not suggest the thing you say is a bad idea.