complex numbers, non exact roots, e, Pi, infinity all names we assign to things we have discovered. They are not exact in the sense we can equate them but the fact we know about them and use them as devices for algebra to solve problems etc is merely consequence of our discovery of maths.
I sense a touch of mischief from jake, happy to play along though, I'm enjoying this subject.
Does the original poster have any observations on this thread or has he, very sensibly, gone down the pub?!