It's only a fact because you're filtering out all cheaper consoles by claiming they aren't credible, which is a subjective criterion you are applying. What constitutes 'credible'?Price isn't the only factor but the highest selling console for the last four generations has been the console that has spent most of the its life in the market at the lowest price to the credible competition. That's a fact
That's an impure argument because credible is undefined. It becomes subjective and needs a whole discussion to define the argument, whereas 'cheapest' is unambiguous and objective.As a pure argument, has the cheapest credible console sold the most for four generations?
There's no need to debate it as you're the only one using it. We don't need to decide what credible is so we can determine if the cheapest credible console wins. We know that the best value and best marketed console wins. You don't win the market by being extra cheap, and you can price yourself out of the reach of the masses which is what PS4 Pro basically does hence it not being the top selling console and never going to be.The answer is yes. You can debate credible if you like.