[nathias]

complex/negative numbers don't actually exist in contrast to natural numbers that don't actually exist in a different way

[Koshkin]

In fact, it's an interesting (and non-trivial) philosophical topic, to consider all different ways in which things do not exist.

[enriquto]

Complex numbers exist just as much as the Euclidean plane. Furthermore, they are also scalings and rotations of said plane.

[carapace]

The Euclidean plane also doesn't exist.

[Koshkin]

It does not hurt to assume that it does.