I think this is more of a credibility issue - i.e. can you trust that this person is giving you the precise facts, allowing you to draw your own conclusions, or

I think this is more of a credibility issue - i.e. can you trust that this person is giving you the precise facts, allowing you to draw your own conclusions, or are they given you a spun version, with certain facts bent, to greater or lesser degrees, to their advantage?