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In that you are right, there may be all types of software that can create art, but there are always details that show that the creator is a human being and not an AI, for this I imagine that Robbet must have a team specialized in art and people who know a lot about the subject, for me it is something they should have and obviously when they detect that it is an AI, they should disqualify and apart from that publish that they are cheating, because something like that should not tarnish the good intention of what it does Robotet especially here in our bitcointalk community, everything has many things to give, and these opportunities have to be taken advantage of, because I really don't have the slightest talent for art.
This is why i dont participate on art contest because i do see that i dont really have any talent when it comes art and using up any software whether it does related to AI or something like that which it does still
need on users artistic design and approach then it would be still useless if you dont really have any idea on what you are doing.When it comes to criteria then its up to them on whats in and whats out.
Doesnt matter if its AI generated or assisted but as long it could be considered as art then it do really counts.
Its their competition and they are the ones who do run then its their rules on which needs to be followed.