offering unbiased gear advice based on personal experience.
If it is based on your personal experience, by definition it is biased.
That's what biased means.
Of course advice can be both biased and valuable.
Not if we are talking English
If I used my experiences to present ideas in an unfair way, then I could be called biased, similarly you can have entirely biased opinions without any experience at all. Bias and experience are totally unrelated.
I like to take part in a debate in which i was not invited so I'll add:
Sorry Private, but I think that Acutance is right from a fundamental perspective. I even think that it is evidenced in the wiki page you linked by :
'' In judgment and decision making
Main article: Cognitive bias
A cognitive bias is the human tendency to make systematic decisions in certain circumstances based on cognitive factors rather than evidence. Bias arises from various processes that are sometimes difficult to distinguish. These processes include information-processing shortcuts, motivational factors, and social influence. Such biases can result from information-processing shortcuts called heuristics. They include errors in judgment, social attribution, and memory. Cognitive biases are a common outcome of human thought, and often drastically skew the reliability of anecdotal and legal evidence. It is a phenomenon studied in cognitive science and social psychology. A cognitive bias also has the tendency to make systematic decisions in certain situations.''
And further supported in the link to 'cognitive bias'.
If your advice are based only on your personal experience, they are not accounting for a significant part of user experiences and are thus biased and anecdotal. However, as stated earlier, they may still be quite valuable as they are from a knowledgeable and well intentioned individual.
No offense intended.