Is Quantum Probability Shaping Our Understanding of Particle Behavior?

[fizzzzzzzzzzzy]

From what I understand, most events in quantum physics are based on probability, right? Is this because there is information about particles that we can't get without interfering with it, or is it because the particles themselves are determined by probability?

Thanks

 

[FunkyDwarf]

Primarily the first one, a bit of the 2nd one too though.