(March 19, 2013 at 9:51 am)Rhythm Wrote: As is our notion of a circle, a real and tangible thing, as to how we define real and tangible surfaces or areas, and process those perceptions (but amusingly not dependent on how we process them or even if we are there to process them at all - something quite a bit different from "red"). Any area or surface that fits the definition of a circle is a circle whether or not there is someone there to percieve it as such, but red positively relies on there being someone or something there that perceives light in such a manner.I don't think anyone is arguing that circles don't exist in the real world, and that we have notions for them. What this thread is about is whether Pi was invented or discovered, and Pi is a property of perfect circles only, which cannot be found in the real world and are inventions of humanity.
Like I said before, you can try to calculate Pi from any circle you find or construct in the real world, but you will never be able to get anywhere near an accurate answer.
