[adzm]

Imagination is real; imagined things are not necessarily.

Imaginary numbers are also not real.

The whole situation is quite complex.

[smhenderson]

I know funny isn't really the goal for comments around here but man that made me laugh. So subtle and obvious at the same time and quite an appropriate response to the posed question!

Complex indeed...

[jallasprit]

To tack on to the amount of complexity; your brain’s operation allows you to perceive a world outside your brain, but the actual perceiving of it happens inside your brain, which again rests inside the perceived world more or less..

[mensetmanusman]

Real gets complicated when human minds are involved :)