Question about the basics of quantum mechanics?

It was a bad point to make. In the quantum world, it's very hard to talk of particles having an exact position, there is a probability you will find one in one place, and a different probability of finding it somewhere else. As an example of a physical event, the fusion reactions in the sun can only take place due to a phenomenon called quantum tunneling, another manifestation of the ambiguity of a particle's (in this case a proton's) position.