In various threads dealing with why mathematics is so good at describing physics, the fact that elementary particles are exactly equivalent is really weird. Are any 2 electrons exactly equal in all possible mathematical sense ? Is this really conceivable and possible ? I find it hard to imagine 2 electrons that are exactly equal as if they were 2 exactly equal numbers. So electrons would end up being pure mathematical objects. They would in essence be pure abstractions. Maybe quantum indetermination and virtual particles and feynman diagrams of electrons self interacting make it so that NO TWO ELECTRONS ARE REALLY EVER EXACTLY EQUAL.... to any decimal place. Very odd problem indeed.