Easy. Tell people that everything from when they were young is "right" and that everything new in the last n years is "wrong". You won't even need to do much

Easy. Tell people that everything from when they were young is "right" and that everything new in the last n years is "wrong". You won't even need to do much research. Hand around people of the age that you're targeting, and just parrot their opinions. (WARNING: This doesn't work if the people you hang around are perpetual learners and constantly challenge themselves. If they're the kind of person who takes language classes "for fun", run away -- their opinions will have nothing to do with your target.)