Hey mbogelund! Notice the Dilbert on the left holds his coffee cup in his right hand, whereas the Dilbert on the right holds his cup in his left. Maybe you could check out past strips and see which Dilbert was being featured on that day. Of course he would have to be holding something in order to apply this theory.
Wait a second...the Dilbert's are holding their cups of coffee in opposite hands. So instead of a look-alike Dilbert, wouldn't this be a BIZARRO Dilbert?
And now all the stuff they said in my last performance review makes sense.
A Wally replica would generate too great a disturbance in the time space continuum. Since Dilbert doesn't appear to be too big of a deal as far as brains go, it's not a strain to produce a binary of him.