My favorite example of this was the Pew Research study: https://www.pewresearch.org/short-reads/2024/03/05/online-opt-in-polls-can-produce-misleading-results-es

My favorite example of this was the Pew Research study: https://www.pewresearch.org/short-reads/2024/03/05/online-opt-in-polls-can-produce-misleading-results-especially-for-young-people-and-hispanic-adults/ https://www.pewresearch.org/short-reads/2024/03/05/online-op... They found that ~15% of US adults under 30 claim to have been trained to operate a nuclear submarine.