I you're arguing that imaginary numbers, are not imaginary... I don't really know what to say here.

Imaginary is a description of what they are. We literally use imaginary numbers, that we define as imaginary, to make sense if certain equations that pertain to reality. Like we could NOT make sense of everything in reality using only real things, so we had to invent/discover imaginary parts of equations, that cannot be explained by real ones, in order to solve those equations.

The thing is, I'm picking kind of a funny(but relative) point here, but there is literally no way to prove that you or I see the same reality or that either is the real one. There have been scientific tests over time trying to figure out if people perceive the same things in reality, and lots of times, everyone's perception of reality is different.

Furthermore, there is also literally no way you can prove yourself right, whereas, there are literally thousands of events/pieces of evidence that argue that you're wrong. Not a personal "you," just stating that no one can prove that any reality is the right one. We just kind of have a mush of communal ideas.