> <i>The authors then train their lens on problems elsewhere: the “twin paradox” in relativity theory, in which two siblings age differently because one takes a trip in a rocket;</i> [...]<p>> <i>In each case, the authors show how these paradoxes result from either trying to avoid talking about experience or trying to turn it into an object.</i><p>I don't understand what it means. We measuered this with clocks and it's real. If we get eough money and two volunteers, we can test it with humans and we will get the same result.