How does NTFS handle the conflict of short file names?

How does NTFS handle the conflict of short file names?

As described at
http://technet.microsoft.com/en-us/library/cc781134%28v=ws.10%29.aspx,
Each NTFS file has a long file name and a corresponding short file name.
NTFS can create more than 300 000 files under a directory, and in such a
case, the short file names will conflicts.
However, Microsoft doesn't answer the question:
How does NTFS handle the conflict of short file names?
Provided that under directory d:\tmp\, there are more than 300 000 files,
therefore, there are at least two different files whose short file names
are both THISIS~1.txt, and if I enter the command "type THISIS~1.txt"
under d:\tmp, what will happen?