I use another tactic sometimes, somewhat related. I make a stronger and radically (more inflammatory if you wish) than the person I am talking to. It has to be just inflammatory enough for them to start defending the weaker more moderate position, basically leaning towards the direction you'd want to persuade them originally. For example, I have some hard core Fox News watching Republicans in my extended family. So s…
It has been used by politicians quite successfully. Like for example if a party wants to make abortions illegal after 3 months of pregnancy, it's better if they start from an outrageous position, like criminalizing all abortions, after which their real target starts being seen as a reasonable compromise. This also works the other way too. Many people that are anti abortions have had abortions themselves or have family members that did - throwing jail time into the conversation or other outrageous positions like criminalizing pregnancies without a license, does wonders, but of course, politicians have to be more careful otherwise they risk losing votes.
If you pay attention, this happens all the time.