This week we learned something very important about diabetes.  We learned that we don't know something we thought we knew.  (Regular readers will note that this keeps happening in medicine.  For a generation everyone assumes something.  Then we check and discover it isn't so.) We've always assumed that in type 2 diabetes, the closer to normal that blood sugar is lowered the fewer complications of diabetes patients would have.  Why?  Because diabetes is known to be a major cause of kidney diseas...