What authority does Semir Osmanagic have to declare this hill a Pyramid? Is he a trained archaeologist? Who has independently confirmed his claims?

The correct answer to this open question is the following.

Although he is not an archeologist, the authority that Semir Osmanagic have to declare this hill a Pyramid is because he has written a book and have talked to many people who knows about pyramids. He has asked permission to enter one of the tunnels of the supposed pyramid complex and has some arguments that support its theory. We have to be very clear on this. It is just a theory that the natural cluster on hills could be in reality the largest pyramid complex on earth.  

There is no archeologists that have confirmed his theory. However, we have to say that many people in the metaphysical arena indeed have confirmed what Osmanagic have said, that it is true that the Bosnia complex has three pyramids.

- "the past is made of multitudinous items ranging from anything that can be collected, recollected or assessed to originate in the past. as such, the past is a gallimaufry of particulars that may not have been related in any way. however, the human mind seeks organization to understand concepts and other things. the human mind therefore seeks relationships in explaining and studying the past. history being a humanity, dictates that historians have to serve this human trait by bringing structure to details of the past. historians do this by creating interpretive frameworks that capture as many details as possible."

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honestly i love the walking dead, mainly the quotes. “well, pardon me young man, excuse the [insert bad word here] out of my gosh darn french, but did you just threaten me? ” sksk (of course it's not the exact words)