Each proposition is like a brick, laid upon the initial foundation and eventually building the lawyer's case. That is where psychology takes over. Psychological Appeal Contrary to what clinical psychologists would have you believe, each and every one of us has a rudimentary understanding of the human psyche. Every child knows how to appeal to the kinder side of parents, usually before they are able to walk and talk. This is where you really go a long way towards making the subject want to help you.
Some ideas are simply repugnant.
That doesn't mean that you won't have to zealously advocate a repugnant idea, it requires you to make it as palatable as possible. The art of psychology and advocacy means that you take a repugnant idea and fashion it in the best possible light so as to make it more palatable. Sometimes this is a simple as minimizing the bad while stressing the good. Other times it means characterizing a repugnant idea as something more palatable by way of analogy. My father is fond of telling me that a person can rationalize doing anything, it just depends on how much he wants to really do what he is rationalizing.