More on οὖν

The procedural instruction that the particle οὖν gives is: ‘this is still relevant’! In other words it encourages the reader to proceed with the text in the belief that the new information is pertinent and directly related to what has gone before. This is particularly necessary if there has been a small digression, as frequently (but not always) happens before the introduction of οὖν.—Margaret Sim, A Relevant Way to Read, 96