Part 2/9:
The EPR Paradox arises from the observation of entangled particles, such as an electron and its antiparticle, a positron. When these particles are produced together, they exist in an entangled state. A key feature of this entangled state is that measuring one particle's properties instantaneously determines the other's properties, no matter how far apart they are. For example, if Alice measures the spin of an electron along a certain axis and finds it to be "up," the positron's spin will necessarily be "down" when measured by Bob along the same axis.