[quote=@whizzball1]
<Snipped quote by Etcetera>

The imaginary mass of tachyons is also a concept that's actually a thing. Once we find tachyons, we'll have a thing that is imaginary in the real world.

(The length of the circumference of a unit circle is an irrational length, and you mentioned the length of the circumference as a real world counterpart. By that logic, the imaginary mass of tachyons is a real world counterpart.)
[/quote]

By the concept of imaginary numbers, by definition, cannot be achieved in real life. And the problem with quantum theories is that they're nearly pure assumptions, and beliefs in particles that "have to be there" because we have no other explanation, currently, similar to Dark Matter.