I'm not very literate, could someone explain to me what
"is a small suggestive gesture that reflects on the way in which humans have imposed their cultural categories over nature"
means? 
Oh, and at the same time, what does a stone have to do with it?
OK here goes. First we have to believe that this stone IS the top of Scafell Pike.
Is this stone any more or less important than any other stone in the natural world? No.
So why are people getting worked up about him taking it and putting it in a gallery? Because it happened to be the highest stone on a tiny bit of the globe that man had drawn a line round, in this case England. It is/was not even the highest stone on this island by a long way.
You could argue that the top of Everest is 'naturally' important but almost anything else is a man made organisation of the world defined by human geography. Scafell Pike is the absolute epitome of this as, to all intents and purposes, England has not been a separate country for hundreds of years yet we still make Scafell Pike in some way significant.
You may not agree with what the artist has done or think that what he has done is art but he has absolutely proved his point. If he had put the top of Scafell in a gallery there would have been nothing, if it had been the top of Catsty Cam less than nothing. If it had been Whernside an outcry from Yorkshire. We have imposed our culture on nature by arbitrarily deciding that one thing is more significant than another when as far as nature is concerned that is not the case.
Just to warn you Peter I can talk this arty rowlocks all day!
