It is, actually
The numbers are imaginary, thus theyte not real, thus the math magicians (not gonna undo autocorrect there) are wrong and refuse to admit it because they insist imaginary numbers are real
Don't apply actual knowledge of what imaginary numbers are for this exercise
Ok, so this is a "joke" which is only funny to people who do not understand the context, and moreover jump to insane, unsubstantiated conclusions rather than expending an infinitesimal measure of effort to understand something they haven't seen before. It's active mockery of the very concept of being open to new ideas.
No, the joke plays on the two meanings of "imaginary" - one being "made up, not real", and the other being the mathematical construct. The fact that you don't get it doesn't make it mockery, it just means you don't get it.
