If one considers the case of the symmetrically twin as done in the present paper, they would come to the conclusion that Einstein's philosophy of relation is at fault with logic.
Article Case of the Symmetrically Accelerated Twins Paper (II)
The case of twins separating in opposite direction is rarely discussed. As much as I understand that classic special relativity cannot explain the lack of accumulated time difference between travelling twins, I cannot understand why the question itself is not being asked as often as it deserves.