I'm wondering if the differences in the rate of time passing by for 4 widely separated atomic clocks caused by a gravitational wave passing by them could be detected. Depending on where the wave(s) originated, it would impinge on the 4 clocks at different times, so they would briefly and sequentially go out of sync as the wave passed each clock and affected each one in turn by changing the rate at which time passed.
The granting of a pardon is an imputation of guilt, and the acceptance a confession of it.