Unanswered Question

Can someone please answer this question from a previous thread. I have the same question (couldn't posted on the other thread my apologies) Hi I have difficulty in diagramming conditionals where Sufficient or Necessary condition is itself composed of a conditional sentence like this one (A). I read your explanation but wonder if it is wrong to diagram it this way: No self-motivated salesperson who are not highly successful: SM and not HSS ----> not WO WO -----> not SM or HSS Because (People who) is a conditional indicator and (No X is Y) is also another conditional indicator so the Suf. condition is in itself a conditional sentence. I find diagramming this double conditional sentences so challenging. Please explain more why is my understanding wrong.