Whether the source has a large following.

Whether anyone disagrees with the source (if any other source disagrees, then the source must be wrong)

Whether the source has strong views on the topic.

Whether the source has a PhD.

Whether the source has strong views on the topic.

Whether the source is reliable.

Whether the source is in a position to know.

Whether the source is reliable.

Whether there is corroborating evidence.

Whether we agree with the source's political views.

Whether there is corroborating evidence.

Whether the source is reliable.

Whether the source is respectful.

Whether the source is in a position of power.

Whether there is corroborating evidence.