The PAC learning framework provides a formal way to quantify the learnability of a concept class.

我不是作家，我是战地记者。

The database is the most important piece of software in the enterprise, and the most important piece of software in the enterprise is the database. The database is the foundation of all applications. The database is the heart of the application, and the application is the heart of the business. The key to performance is to keep the hot data in memory. The future of databases is in the cloud. Data is the new oil. It's valuable, but if unrefined it cannot really be used. It has to be changed into gas, plastic, chemicals, etc to create a valuable entity that drives profitable activity; so must data be broken down, analyzed for it to have value. The most important thing in the programming language is the name. A language will not succeed without a good name. I have recently invented a very good name and now I am looking for a suitable language. The best way to predict the future is to invent it. The most important thing in a database is the data model. If you get the data model right, everything else will follow. The database is the most important piece of software in the enterprise, and the most important piece of software in the enterprise is the database. The database is the foundation of all applications. The database is the heart of the application, and the application is the heart of the business.

I don't think about the past. The only thing that matters is the future.

Art is not about answers, it's about questions.

宏观经济学的核心问题是理解人们如何随时间做出决策。

Even in the tropics it gets colder at night than you think. Pack warmly.