@Sarov That's going to be a hard one. You could try the Sandbox if you like... I'm personally not a big fan of 'how to convince' questions, because they're so often leaning towards 'give me new arguments' instead of 'give me a good way to present my arguments so I can be more persuasive'. And even the latter is difficult.... because you need to include what you've tried (which, for trying to convince people, is going to be tedious if you just try the same arguments over and over) ... or

or state what you plan to do, but then it's very hard to predict what your current approach would be wrong/open to going wrong, and what to change beforehand :|