A skilled manager always considers motivations and outside influences when evaluating a subordinate’s recommendations. Do they think there is not enough information to proceed just so they can get out of work early? Do they think a product feature is critical only because they were the one who implemented it? For good managers these things usually stick out.
What even very skilled managers often forget to do is apply this logic to themselves. Before you make critical decisions its usually a good idea to make sure your judgement isn’t clouded.