The hard part is that most people cannot use rational to change their minds or give them something to think about. Emotion and the fake news is a powerful weapon. Same goes with TDS. So it depends how open the other person is.
What I do instead is to ask questions or give points that they cannot say no to. Like " so you would support a rapist not being shot by their victim and being able to rape without worry". If they say yes, then they look like a fool to anyone listening. What may happen is they reply " the gun can be taken away and used against her". Then I reply, well, then she's in the same situation. But at least she had a fighting chance against a bigger stronger attacker. Then add in it takes 1.5 seconds to draw and fire. and throw in a woman 5'1 95 lbs vs a 6'0 300 lbs attacker.
Or "so HPD approved the course teachings and made up the annual shooting requirements, are you saying HPD is incompetent or cannot be trusted?"
Basically try to be passive aggressive. And is someone really wants to have an open discussion, then I ask prior to if they're willing to listen to LOGIC. And if they say no, then I say "well then, there's no point in discussing because no amount of logic or reasoning will change your opinion".
The issue would be at a family gathering and letting them win by staying silent as not to interrupt or spoil the event.