  The Hamiltonian structure of General Relativity (GR), for both metric and
tetrad gravity in a definite continuous family of space-times, is fully
exploited in order to show that: i) the "Hole Argument" can be bypassed by
means of a specific "physical individuation" of point-events of the space-time
manifold $M^4$ in terms of the "autonomous degrees of freedom" of the vacuum
gravitational field ("Dirac observables"), while the "Leibniz equivalence" is
reduced to differences in the "non-inertial appearances" (connected to "gauge"
variables) of the same phenomena. ii) the chrono-geometric structure of a
solution of Einstein equations for given, gauge-fixed, initial data (a
"3-geometry" satisfying the relevant constraints on the Cauchy surface), can be
interpreted as an "unfolding" in mathematical global time of a sequence of
"achronal 3-spaces" characterized by "dynamically determined conventions" about
distant simultaneity. This result stands out as an important "conceptual
difference" with respect to the standard chrono-geometrical view of Special
Relativity (SR) and allows, in a specific sense, for an "endurantist"
interpretations of ordinary "physical objects" in GR.
