Further - paired electrons can collectively form the spin-zero singlet state, or spin-one triplet state. In either case the two electrons, which are fermions in

Further - paired electrons can collectively form the spin-zero singlet state, or spin-one triplet state. In either case the two electrons, which are fermions independently, together act like a boson (eg, Cooper Pairs in a Superconductor). Addition of quantum angular momentum is really weird.