The Concept of Fungibility

The term is borrowed from legal terminology, where it refers to the legal fiction that deems certain entities to be identical for purposes such as paying debts. The physical fungibility i am referring to here is about deeming. It means being identical. And that is very different and a counter intuitive property. David writes: You will not find the concept of flungibility discussed or even mentioned in many text books or research papers on quantum theory. Nevertheless, it is everywhere, just beneath the conceptual surface. And i believe that making it helps to explain quantem phenomena without fudging.