hi, i have a question. are electrons distinguishable ? my personal view is they are not. because distinguishable means different quantum numbers. okay one electron can have spin up and one can have spin down, but this property is not lorentz invariant, and so this property is not qualified to distinguish. that means all electrons are not distinguishable, although they might have different quantum numbers (like spin, or impulse) ? is this right ? thanks in advance.