Having pockets of material being non-superconductive means they're a different phase (like crystallographic or stoichiometrically), that is a defect. I'm talki

Having pockets of material being non-superconductive means they're a different phase (like crystallographic or stoichiometrically), that is a defect. I'm talking about a material that doesn't have any kind of phase segregation. In that case, the superconductive phase it 100% a "yes or no" property and that's that. You're wrong.