Unified Root - Domain Configuration Issue

[ozgurs]

We want to buy a unified root domain,
but they say we can not use the domain only one word.
like
ozgurs

so that it opens
http://ozgurs


but we have to use a connected word to this TLD, like
example.ozgurs

here, my quetion comes! :)

i bet with my friend that we can not use the domain itself.
NOW
I NEED A PROOF :>

We want to know the reason why we can not use TLD alone itself,
without a word in connected to it.



( I mean: instead of the URL



ozgurs



we have to use



example.ozgurs

)





We want the reasons, with exact documents (for example a university’s
DNS managerment document from their site link or a scientific article
regarding this issue (about the must of usage and reasons why we must
use a word connected to the domain.)





Note: We will buy these products after we are satisified with the
explanations and documents’ reliability about the explained issue
above. (the usages, rules of domains, configurations, DNS)

I mean I have to prove this that it is impossible to use the domain as
one word (like ozgurs) with very reliable indications and strongly
that no one can deny it any way of idea)






With best regards,


OzgurS