Is it possible for two users to have the exact same username?

In particular, I look here and here.

I don't like that, I think. Another mixedmath prancing around... hmm. Is there any limit to the number of mixedmaths running around?

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    $\begingroup$ Yes, it is quite possible. Trust me, there are more Alex's around than I can count, which is one reason I changed my username name to my full name. $\endgroup$ – Alex Becker Mar 21 '12 at 4:45
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    $\begingroup$ Another mixedmath... Very confusing! $\endgroup$ – lhf Mar 21 '12 at 14:29
  • $\begingroup$ Note that those two are both "Unregistered accounts" of recent creation. Morevoer, from the beginning of this question it is clear that it is the same user. $\endgroup$ – Arturo Magidin Mar 21 '12 at 15:39
  • $\begingroup$ Yes, I am aware that he was the same user. But that's how I noticed. $\endgroup$ – davidlowryduda Mar 21 '12 at 18:04
  • $\begingroup$ In the real world there are many collections of people who share a name. We distinguish the individuals by context and/or appearance. People can distinguish you as the mixedmath with the blue picture. $\endgroup$ – Jay Mar 22 '12 at 13:44
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    $\begingroup$ @Jay: Unfortunately, you cannot distinguish between people by their pictures or rep by simply looking at their name after they comment. This also makes me wonder how pinging works if there are two people with the same name who have both commented. That's very unclear to me. $\endgroup$ – davidlowryduda Mar 22 '12 at 17:17
  • $\begingroup$ There's a bunch of Matts, Jonases, and Davids as well, so I suppose duplication's par for the course. $\endgroup$ – J. M. is a poor mathematician Mar 24 '12 at 11:14

There is no limit. Users are fundamentally differentiated by their numeric user id, so anyone is free to use any name they choose (within reason - names that are obviously offensive would be edited, for example).


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