While it is difficult to dislodge a faulty opinion once held, it is not impossible - especially if presented with an incongruent fact that produces cognitive dissonance. One example is that progressives think that Conservatives don't care about the poor while the fact is they donate more to charity than liberals. Can you think of other examples? Bonus points for including a follow up to their inevitable response to the dissonance. While this question is focusing on ways to reach progressives, feel free to point out blind spots that Conservative have as well.