STRIP FOR Mar 5, 2009

What about the fact one holds his coffee with the left hand and the other holds his coffee with the right. Combine that with the shirt pocket thing someone else mentioned and I'd say this is his mirror image as opposed to replica.

"Who is the real Dilbert"-issue:
You guys seem to forget something.
The Dilbert on the right says that there is a replica of every employee, and that he himself isn't the replica of the left one. Which means that must be at least one other Dilbert-looking guy in the company.

And maybe that third Dilbert-looking guy is "the real Dilbert" - so the real Dilbert might not even be in the picture!

Men's breast pockets are on their left, including Dilbert's. The only time we see one in this strip is in the middle frame (on the man on the right), and it is clearly on his left, but somehow not visible in the other frames. The man on the left may have his pocket on either side, since it wouldn't be visible in any of the frames anyway.

This would imply either that:
1. the man on the right is the real Dilbert (and the other man is the new character),
2. or that the man on the left is the real Dilbert (as the strip seems to imply), and the man on the right is the new character, who wears ordinary men's shirts (with the shirt on the left).

After all, why would his pocket have switched sides? They're lookalikes, not mirror images! My brother is left handed, and his shirt pockets are still on his left.

Which means that the one on OUR actual left is dopplebert, and dilbert is on the right.