From the article, this person has done over 4,000 interviews. Their primary job is to talk to people, find out as much reliable information as possible to allow

From the article, this person has done over 4,000 interviews. Their primary job is to talk to people, find out as much reliable information as possible to allow them to decide whether they are the right fit for the role. When this is your job, you need some framework/toolchain to do it in a consistent manner. The problem (as many people here would frame it at least) is that unlike engineering, the best practices are very soft and subjective to each person, since the perception of another person is through your own lens. So this author is trying to convey the importance of having multiple lenses to view people through, so you have a higher chance of seeing signal from that person, rather than reflected signal from yourself. I found it very helpful (and I am prone to dismissing people that do this as scummy/manipulative when I encounter them), and made me a little more understanding.