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Matt asked this question.

Matt answered that question (which isn't an answer). Both are joined before a week so I assumed he's one person. They have both same gravatar.

and one more question - how did he do that? Two accounts, two email address ( = multiple openIds), right?

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2 Answers 2

up vote 10 down vote accepted

how did he do that? Two accounts, two email address ( = multiple openIds), right?

Both users are unregistered (it says "Unregistered User" at the top of their profiles), so they don't have OpenIDs. When he posted the question he filled out the Name/Email fields below the question body:

Screenshot of the answer box

Then he lost his cookie, so when he went to post an answer he filled them out again, creating a separate account

You don't really need to post a whole meta question when you see things like this; just flag the question for mod attention and let them know the accounts should be merged

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okay, I'll remember that for the next time. sorry –  genesis Sep 10 '11 at 1:11
3  
@genesis No problem, it's not really wrong, just slow; I'm not sure how you ended up at -3 –  Michael Mrozek Sep 10 '11 at 3:38
    
-1 now. I think these c++ room guys are still angry –  genesis Sep 10 '11 at 12:50

Well we know that the gravatar is generated based off the email address, and the 2 accounts are clearly separate (difference in rep, creation date, badges, tags, questions), so I would say your explanation is highly probable.

Two accounts with the same email address.

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I think it's based off the Ip address –  genesis Sep 10 '11 at 1:13
6  
@genesis: Nope, it's the email address. –  hammar Sep 10 '11 at 1:17
2  
It's IP if the user has no e-mail –  Michael Mrozek Sep 10 '11 at 3:35

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