Paradox in OWL

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Hi everybody,

I've read that there are some paradoxes that can arise using OWL. In
particular, using OWL Full, due to its capability to define
metaclasses.

Could you please give me some examples of this? I think this is
related to something called "nonmonotonic behaviour" (but I'm not
sure).

I would also like to know if there are strong use cases for OWL Full.
It seems that OWL DL should be enough (except in some cases I don't
know about).

Thanks in advance,

Sergio