Board Thread:Questions and Answers/@comment-4495539-20140531082603/@comment-25413416-20140922105957

valid point - but it can be hard to even cnstruct a 'stable' theory

obviously doctor who gets away with it with never clearly explaining it - like hoow he explained the time vortex being 'made of wibbly wobbly timy wimy stuff' - but that could only work so far before you need to add something more substantial