Fundamentally, do events repeat themselves on the quantum level?

Question

Isn't entropy always operating in the quantum world? How could two disparate events be exactly the same? How can two events repeat in quantum reality?

If the events in the quantum world fundamentally do not repeat, how can one design equations or experiments that veritably address quantum reality? Isn't it a question of unrepeatable performance then, rather than replication? Is quantum reality at odds with science, with science's premise that repeatability is extremely important? Does that make replication in science a delusion based on an illusion, rather than a fact?

It is impossible for one exact thing to be in two places at once. Also, it is impossible for two separate things to be in the exact same place at the exact same time. True?

Answer 1

so many questions

can tests be repeated? yes. at the quantum level you can have 1 electron interacting with 1 photon, and repeat it a million times, so in some ways it's more repeatable than calssical experiments. you might get different results, but it is still a repeat, and the outcomes occur with a probability predicted accurately by QM

quantum physics may be bizarre when compared to everyday life for a human, but it still goes on nonetheless and everything you see around you comes from these processes.

there are no delusions or illusions involved.

2 places at once... kind of. more like everywhere at the same time with a range of probability, but only until whatever it is interacts with something and is observed. observing it 'pins it down'.

impossible for 2 things to be in the exact same place at the same time... no only fermions. there are bosons which can all occupy the same space and time, and millions of the things can be treated as a single entity for all intents and purposes.

Quantum physics is not not 'at odds' with science at all

QM one of the most accurate physical theories that man has

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minor fluctuations?!  pff then nothing is ever repeatable.  what difference does it make if something's moved by a micron or a mile, if the position has no relevance to the experiment?  and if it is relevant, then i'm sure the people doing the experiment would take that into account

also, 'quantum' implies that certain discrete states exist in a lot of the measurable quantities.  so it would be quite easy to spot something wrong in a lot of cases

Answer 2

when a stone is cast on the water.there is a small wave made.and another and so on.when in fact the stone was cast only one time.yet many waves have been created.just like your question.