" Yale political scientist Alexander Coppock conducted a series of experiments designed to measure incremental changes in political opinion when people are presented with new information about a topic. ... [H]e was able to draw four consistent conclusions about the way that our brains react to new political information:

1. Effects are nearly uniformly positive: individuals are persuaded in the direction of evidence.
2. Effects are small: changes in opinion are incremental.
3. Effects are relatively homogenous: regardless of background, individuals respond to information by similar degrees.
4. Effects are durable: at a minimum, effects endure for weeks, albeit somewhat diminished. ...

This means that people do not change their opinions dramatically in a short amount of time. But it also means that partisans don't reject good arguments and good evidence when they encounter it just because it does not conform to their worldview. "

― Michael Austin , We Must Not Be Enemies: Restoring America's Civic Tradition