This is:

Explain Heisenberg’s principle of uncertainty in the simplest possible language.
I take any two particles, measure their backs, and ALWAYS the result of the measurements will be opposite? If not, how do you understand this principle?

Q. What kind of stuff in your head? The uncertainty principle has nothing to do with spins, it speaks about the coordinates and pulses of a particle.
The back is Paulie’s principle. He says there cannot be two fermions!(not any particles, but only with a half-whole spin (1/2, 3/2...)) in the same state. Thus e. If you take two electrons in one (!) And the same "floor", and with the same energy, then yes, they will necessarily have opposite backs.