That might be me.

But I think it is preferable, in general, to judge arguments on their content rather than on anything you might know, guess, or be prejudiced (for good or ill) to believe about the speaker, unless the speaker is intending to act as a representative of some position. It's totally reasonable to stand as a representative for something; I'm just more interested in the actual content, the actual arguments. I don't want to learn that "building contractors say that walls are solid". I want to learn "walls are solid--here's how we know".

In order to help focus on the issues being discussed, I prefer to de-emphasize any personal traits like nationality, age, political affiliation, etc.. In retrospect, I probably should have used an obviously non-human or anonymizing pseudonym as Argumentative Penguin does.

This is neither because I want to avoid responsibility (I am happy to stand by, or apologize for, as appropriate, everything that I've said) nor because I want people to presume I have experience that I don't (I rarely claim any, except for having some familiarity with some sciences, and I can't ever recall having criticized someone for doubting my experience: I should either be able to demonstrate my competence, or I should shut up). I simply wish for my words to stand on their own as much as possible, and to encourage others' to also. It enriches all of us when a dialog is internally well-supported and broadly accessible.

In the cases where background is important (e.g. "nobody eats soybeans for breakfast"), one can explicitly clarify as needed with pertinent context (e.g. "as a resident of Tokyo, I can attest that many people do eat fermented soybeans for breakfast") instead of assumptions (Ichiro Tamagawa: "Many people do eat fermented soybeans for breakfast.").

There are other reasonable ways to conduct oneself (I don't criticize, say, Hermes Solenzol or you for taking a more overtly this-is-the-full-me approach.) For instance, one could take the Facebook approach of sharing as many human details as possible. But if I wanted to do that, Facebook is much better at it anyway. Medium seems like a place for ideas. I like to do what I can to encourage the focus to stay there.