Determinism Is Self Defeating

[little_monkey]

Evolution by common descent isn't a direct observation either, but it is far and away the best explanation of the total sum of all relevant observations concerning the theory of evolution.

Quarks aren't directly observed, but it is far and away the best explanation of the Standard model in regard to hadrons and mesons.

Quantum states are vectors in a Hilbert Space isn't a direct observation, but it is far and away the best hypothesis on which Quantum Mechanics is founded on.

You need to brush up on what is a hypothesis, a theory, and supporting evidence.

All the things you mentioned are (I believe) falsifiable. You could come up with evidence that would disprove them. But how would you disprove determinism? You wouldn't-- you'd say, "Oh, science had ____ wrong, so it's impossible to make meaningful predictions. We must look for a new theory." At no point in this process does modifying the philosophical basis of determinism come into the question.

Determinism IS falsifiable: if I could produce a real rabbit out of thin hair, IOW, magic, not the art of illusion, but real magic would disprove determinism. In such a world, anything would happen without cause, and hence predicting the future based on scientific laws would be impossible.