You can convince someone to do anything. You can also convince everyone to something. But I can’t believe that you can convince everyone to do anything.

But with enough time and planning you can convince nearly anyone to do nearly anything. However timing becomes a factor here.

That is part of filtering: You have to evaluate how much effort it will take to approach, build rapport, and then persuade someone. Some cases are easier than others and a good filtering process will help you find out what are the fruits hanging lower on the tree, and you go for those. Life is short, and we can’t waste time convincing everyone while all you need is find the one person that is already convinced.