Posts for: #Note

胡适的治学方法三讲，讲得也很好，哪怕放到现在，也挺实用的呢。

I think of Perplexity as a knowledge discovery engine, neither a search engine. Of course, we call it an answer engine, but everything matters here. The journey doesn’t end once you get an answer. In my opinion, the journey begins after you get an answer. You see related questions at the bottom, suggested questions to ask. Why? Because maybe the answer was not good enough, or the answer was good enough, but you probably want to dig deeper and ask more.

几个简单的原则造就了维基百科，这是原则之一：

We’re always making sure we can cite what it says, what we write, every sentence. Now, what if we ask the chatbot to do that? Then we realized, that’s literally how Wikipedia works.

In Wikipedia, if you do a random edit, people expect you to actually have a source for that, and not just any random source. They expect you to make sure that the source is notable. There are so many standards for what counts as notable and not. He decided this is worth working on.

The first employee we hired came and asked us about health insurance. Normal need, I didn’t care. I was like, “Why do I need a health insurance? If this company dies, who cares?” My other two co-founders were married, so they had health insurance to their spouses, but this guy was looking for health insurance, and I didn’t even know anything.

Who are the providers? What is co-insurance, a deductible? None of these made any sense to me. You go to Google. Insurance is a category where, a major ad spend category. Even if you ask for something, Google has no incentive to give you clear answers. They want you to click on all these links and read for yourself, because all these insurance providers are bidding to get your attention.

We took this principle and asked ourselves, what is the best way to make chatbots accurate, is force it to only say things that it can find on the internet, and find from multiple sources.

• Aravind Srinivas

When I wrote my first paper, the senior people who were working with me on the paper told me this one profound thing, which is that every sentence you write in a paper should be backed with a citation, with a citation from another peer reviewed paper, or an experimental result in your own paper.

Anything else that you say in the paper is more like an opinion. It’s a very simple statement, but pretty profound in how much it forces you to say things that are only right.

有些朋友不明白为什么我要用 Calendar，同时还要用 Todo。

我的用法是：Calendar 用来记录“和其他人一起的事情”，比如开会、聚餐等。因为是和其他人一起，就有很强烈的时效性，比如约好了 8 点开会，我 10 点到，会耽误别人的时间。属于不能错过，过时就没用甚至不再需要做了的。

而 Todo 更多是我自己的事，比如写文章、阅读、测试软件、买东西等。这些事只跟我自己有关，就算我设了个完成时间，过时了也无所谓，而且过时了也还需要显示出来并且提醒我——谁让我是个拖延症患者呢。

顺便再推荐一个小作品 EasyDay：https://easyday.app/zh/easy_day/

会不会有人跟我一样，没看奥运开幕式，也完全没看任何奥运比赛的直播/转播？

说起网证服务平台，我其实觉得还蛮好的。原因是：

• 按照法律法规，本来上网就要实名，但因技术不成熟，开发者为了合规，必须采集用户信息，包括但不限于身份证、手机号等。
• 同样按照法律法规，这些信息的保存、使用其实非常敏感。

就我们的业务而言，我们最早就一个微信 SSO 登录后，我们什么都不拿，连密码都没有。后来为了合规，要手机号、要身份证信息、要银行卡信息……

这些信息要了之后，其实战战兢兢。我巴不得有一天可以直接全部销毁。毕竟怀璧其罪。

大家日常通勤的背包用的是啥？我背了 4 年 Peak Design 20L，整体很满意，各种细节设计以及质量都很好。唯一的缺点就是稍重，空包也接近两公斤。刚刚看 YouTube 刷到 Aer Tech Pack 据说更舒适，又看 PD 有 Zip 版本 15L，不知道还有没有更舒适轻便的选择？