Reality is impossible for anyone except God to know.
Not difficult. Not takes a big effort to achieve, not you really have to be dedicated.
Impossible! Everyone goes with their perception to make their opinion, and actions.
The big difference is where you get information from.
For example I searched for the top 10 countries by square miles
Russia was #1, and 5 through 10 were stable.
But numbers 2, 3 + 4 were juggled on different sites between Canada, US, and China.


Dry land, no lakes, bays, straights, US and Canada. No contested land (Taiwan, Tibet)China,
It goes on and on to where you can't even know reality on a single point.


Now I see they wanted to shown the difference of where people think they're at, think their neighbors are and think people nationally are at on certain topics. I can see how hard that would be to create without influencing the outcome.
The result was it shows people's perceptions control everything, not reality.