I think you misunderstood the basic concept here.
Hmmmm, that natural key in particular is odd. There is no restriction for you to have both sets of keys, natural and surrogate. I would mix both tables i'd use LogID for PK and create a unique index for LogType+ModifiedDate, so that way you have a single field PK for joining tables (which I think is a good thing) and you have your Business/Natural Key (still unique just not Primary) for whatever you need it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.