On Spavieri's conundrum or the shadow of the twin paradox -- A submission to the One-Way Linear Effect (OWLE) Award

We deal with a problem concerning a supposed inconsistency in the special relativistic treatment of the so-called linear Sagnac effect. It is shown that, under modern clothes, the root of the difficulty perceived by some authors lies in their uneasiness with the standard solution of the twin paradox. In particular, since the linear Sagnac effect is an absolute effect, no tinkering with conventionality of simultaneity, so far as it preserves the physical content of special relativity, would get us out of the supposed trouble.