If you only hear one side, you’re not informed. You’re recruited.

Hearing one side produces certainty, which is easy to mistake for understanding. A good argument against nobody is always convincing, because the other case has been summarised by the people who disagree with it, and summarised badly on purpose. You end up with strong opinions and no idea what the actual disagreement is.

So find the best version of the other side, not the worst. Read or listen to somebody who holds it and is clearly not stupid, and see whether you can state their case in a way they would accept. If you cannot, you do not yet know what you think, however strongly you feel it.