This is a repository for major, life-altering mistakes that you or others have made. Detailed accounts of specific mistakes are welcome, and so are mentions of general classes of mistakes that people often make. If similar repositories already exist (inside or outside of LW), links are greatly appreciated.
The purpose of this repository is to collect information about serious misjudgements and mistakes in order to help people avoid similar mistakes. (I am posting this repository because I'm trying to conduct a premortem on my life and figure out what catastrophic risks may screw me over in the near or far future.)
I understand that it would be incorrect to show up at a wedding, funeral, or job interview wearing shorts, sandals, and a t-shirt with a bad science pun. Those are special occasions with different rules from the rest of your life, and fortunately they are rare.
Why, in everyday life, would dressing like a nerd indicate blithe indifference towards anyone? Would I seem more empathetic and human if my shirt advertised a band instead, or had buttons? What are some common environments where looking like a nerd is a disrespectful violation of decorum?
Looking like a nerd is not a disrespectful violation of decorum -- disrespectful violation of decorum was part of an analogy about first-order and second-order signaling. Sorry that this wasn't clear. I edited my original comment, and will restate and rephrase the crux of the comment here.
Let's take it as a premise that a large portion of people believe a nerdy appearance signals poor social prowess. Given the premise, people might emit nerdy signals anyway if: