walkman - 7:47 pm on Jun 30, 2011 (gmt 0)
Adding a sentence or two is one way to do this; even better would be to make it completely unique.
I really hope you aren't relying on this. I can show you where Google's advice on dupes /near-dupes was to 'let us sort it out'...and then came Panda.
What individual engineers said yesterday or a year ago can easily mean at least a 5+ month open-ended Panda vacation. They don't even include a return ticket.