A Concrete Paradox in Special Relativity: On the Non-Necessity of Causal Order Preservation (De Giuseppe Paradox)

We present a concrete paradox within the framework of Special Relativity, demonstrating that the preservation of causal order is not a logically necessary consequence of the theory. The paradox, here termed the De Giuseppe Paradox, involves a subject (A) transporting construction materials at relativistic speeds to an end-point (y), where a collaborator (B) constructs a wall at an intermediate point (M) along A's trajectory years later. The paradox highlights two central issues: (i) apparent violation of causal order, as the wall at M exists before A arrives with the necessary materials, and (ii) the ontological co-existence of the same matter both in the wall and on A's spacecraft. We formalize the paradox mathematically using time dilation and Lorentz transformations and compare it to classical scenarios such as the Tolman paradox, demonstrating its concrete, logically unavoidable nature.