This echoes to a statement in the "A Murder Of Crows" documentary linked in this thread, which goes like "They are smart, but we are the smartest". If there is an intelligence vastly superior than ours, what are the chances that we find out it exists? Can an "inferior" intelligence identify an other one as "superior"? Put in another way: if a superior AI emerges from one of our experiments, will we be able to understand its output?
If we ask it to dumb it down sure. Also often it's a lot harder to find a conclusion then to understand the conclusion and how to arrive at the same conclusion. Unless it's so complex our minds cannot comprehend it without years of study on 1 particular problem. But that is already occurring in silence today not ?
