[wsy]

Superdeterminism looks like metaphysics to me. It seems an attempt to postulate a fundamental truth about the world, but without empirical foundation. Which experiment would falsify the superdeterminism hypothesis?

[gliese1337]

The one proposed in the paper: looking for time-dependent correlations in the measurements of quantum states that are prepared to be as identical as possible.

[akvadrako]

Nothing can falsify superdeterminism in general. If you proposed one specific model of that, that might be falsified.