So, I was watching the new Doctor Strange movie (cracking film, by the way) and I realised something odd.

The Ancient One says during an early section, before Strange's training properly starts, that *believing in **an infinite multiverse** also means believing in infinite dangers* or something close.

Later on in the film we of course meet the Dark Dimension. It's *the* Dark Dimension - only one, or so it's implied. But surely, in an infinite multiverse, there will be at least one, if not an infinite number of dimensions/universes in which everything is almost exactly the same, with only small differences, for example the sky is a slightly different colour. Something negligible. So why is there only one Dark Dimension? (For that matter the same thing happens with *the* Mirror Dimension.