"pi is a lie" and "pi is wrong" are incredibly disingenuous slogans. I would be really excited about this site if it weren't for these sensationalist remarks at

"pi is a lie" and "pi is wrong" are incredibly disingenuous slogans. I would be really excited about this site if it weren't for these sensationalist remarks at the top. It's sad, because their main content is all about mathematical reasoning, which overall they do a fine job presenting. pi is not a lie. It's not part of some conspiracy theory among math elites to mislead the masses. It's not about math bureaucrats refusing to admit they were wrong. Everything they told you about pi is true (or it isn't, but in that case it's not true of tau either). pi and tau are really just two different notations for the same concept. Only perhaps one is more elegant and convenient than the other, making it more fundamental in some mystical way (and perhaps preferable if you ever need to convince visiting aliens that you are intelligent).