Sometimes propaganda from different sides gives contradictory information.
Governments who create propaganda might also select particular information that promotes what they want people to believe.
Come up with a new idea that helps people access all the factual information that they need and check whether propaganda is telling them the truth.
It could be something to do with technology - like an app on a phone...
...or it could be something that someone finds within a newspaper or on a website
...or it could be something that is taught in schools
...or something else!
Also, remember to explain why you think your idea would work!