I think bots will detect potential duplicates but will have quite a high false positive rate so humans will ultimately be the ones challenging or not.
My theory: the blockchain tail is wagging the user-experience dog.
In other words, the UBI and PoH Solidity code is a marvelous achievement of blockchain programming purism. From the initial submission to the vouching, everything happens on the 'chain.
But if one was to design a UBI user experience that was compassionate and a pleasure to use, it’d look nothing like the current app.
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Hi guys, it also happend to me 
! my girlfriend submit the video with the wrong paper orientation and now someone challenged her. Is there any way to solve this, without losing my deposit of eth?
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I’m interested to know the impact on her. How much is the deposit as a percent of e.g. her rent or monthly income?
For me it ($700) was one half of a month’s rent for my Denver Colorado apartment.
But I’m sorry, I don’t know of a way to protect her deposit.
For her is like one full month of rent !
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Duplicates, maybe. But technical errors are easy to detect in an automated fashion.