On attempts to rescue the conventionality thesis of distant simultaneity in str

Recently, some conventionalists have tried to rescue the conventionality of distant simultaneity by introducing a spatially dependent(x,y,z), where {1,2,3}. In this paper, we show that this attempt fails by providing a detailed analysis of the coordinate independent and non-conventional procedure for directly measuring the metricd_M²on eventspace with respect to a physical radar coordinate system. The measuredd_M²in turn provides the empirical basis for uniquely determining the hyperplanes of space for a given inertial observer in a way that makes absolutely no reference whatsoever to any kind of synchrony, whether spatially dependent or not except for the sole purpose of assigning physical coordinates to events.