If you understood simple English you would have read what was said earlier. Separation or isolation is a method of production. As I've said before the fluorine existed before- it was not manufactured out of whole cloth. We did not construct it atom by atom. That being said the electrolysis is a method of producing fluorine out of said hydrogendifluoride. We actually do produce oxygen though. Via cryogenic distillation or vacuum swing absorption. Once again this is fairly simple, we derive oxygen from other things through these processes. This is called production. That's why the article talking about the manufacture of fluorine never mentioned magically creating fluorine it's a process of derivation. Best way to label that process "Manufacture of Fluorine." When you brew beer or distill liquor no one thinks you have suddenly created ethanol. You've added multiple parts in a process that will yield something different but with characteristics of its constituent parts. Granted distillation and brewing are far less complicated than anything previously discussed, but they share similarities. I never once claimed we create fluoride out of nothing. But yes we do have methods of producing fluoride and that method usually is a secondary reaction from other production methods. All of this is well known, entire industries exist on this concept. I sell the machines that perform these things all over the country.