unless you have data saying "all" is wrong. You can say "many" and it will be true, and people won't argue. The "corruption perception index" is based on this

unless you have data saying "all" is wrong. You can say "many" and it will be true, and people won't argue. The "corruption perception index" is based on this sort of thing: people say "Italy is the most corrupt place in the world!" and have no data or knowledge to compare.