Robin Hanson makes a list of "Signs that your opinions function more to signal loyalty and ability than to estimate truth:"
- You find it hard to be enthusiastic for something until you know that others oppose it.
- You have little interest in getting clear on what exactly is the position being argued.
- Realizing that a topic is important and neglected doesn’t make you much interested.
- You have little interest in digging to bigger topics behind commonly argued topics.
- You are less interested in a topic when you don’t foresee being able to talk about it.
- You are uncomfortable taking a position near the middle of the opinion distribution.
- You are uncomfortable taking a position of high uncertainty about who is right.
- You care far more about current nearby events than similar distant or past/future events.
- You find it easy to conclude that those who disagree with you are insincere or stupid.
- You are reluctant to change your publicly stated positions in response to new info.
- You are reluctant to agree a rival’s claim, even if you had no prior opinion on the topic.
I would add: You feel uncomfortable taking a position which raises the status of the people you usually disagree with.