Events in quantum mechanics are maximally non-absolute

The notorious quantum measurement problem brings out the difficulty to reconcile two postulates: unitary evolution of closed systems and wave-function collapse after a measurement. This problematics is particularly highlighted in Wigner's friend thought experiment, where mismatch between leads conflicting descriptions for different observers. A recent no-go theorem has established that (quantum) statistics arising from an extended scenario incompatible when one try hold together three innocuous assumptions, namely no-superdeterminism, parameter independence absoluteness observed events. Building on this scenario, we introduce novel measures non-absoluteness first based EPR2 decomposition, second involves relaxation hypothesis assumed aforementioned theorem. To prove correlations can be maximally non-absolute according both quantifiers, show chained Bell inequalities (and relaxations thereof) are also valid constraints experiment.