The only reason we (humans) were able to proudly say "we are smart beings" is because there is no smarter being to show us that we're not, exactly how we showed the monkeys how smart we are.
Actually I would disagree we are the only animal destroying its own environment that sustains our life... if that isnt a great example then.... in order for you to be designated smart another animal must say so.... trump says he is smart all the time however I've never heard anyone else refer to him that way.... in other words we cannot not designate whether we are intelligent or not because our perception is bias and for there to be a true answer then it must come from a non bias source