昨日阅读3h,累计 734.5 h
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《思想的力量:哲学导论》
469.
笛卡尔
勒奈-笛卡尔(Rene Rescartes, 1596-1650)渴望在混乱的年代中为理性建立起一个不可动摇的立足点。
笛卡尔的方法是任何观点无论表明看起来多么合理,都要对它加以怀疑以便确定它到底是否无懈可击。(我思故我在)
笛卡尔对上帝存在的证明:第一种证明(本体论和宇宙论的混合体)
另外还有两种证明
他认为,你深思熟虑之后就会发现除非上帝存在,否则你不可能拥有上帝这一概念。
大约150年后,伊曼努尔-康德系统地阐述了对本体论证明的经典反驳。
470.
笛卡尔的证明在宗教哲学史上是十分重要的,因为它们提出了一些关键问题:人是如何拥有一个无限存在者的概念的?
471.
莱布尼茨(1646-1716)是17世纪欧洲大陆理性主义者之一(另外两个是笛卡尔和斯宾诺莎)
不仅独立于牛顿单独提出了微积分学说,还创立了单子的形而上学学说。
充足理由原则(principle of sufficient reason):事物恰好这样而不是那样存在必然有一个充足的理由。
并把此原则用于对上帝的证明。
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Blockchain:
Downsides
Decentralized systems are not without their downsides. Here are a few key issues with decentralized systems that have specific relevance to blockchain:
- Speed
- Censorship resistance
- Chaos/non-determinism
Speed
Centralized systems and decentralized systems tend to be faster or slower at dealing with certain types of events. Blockchains are decentralized systems of record keeping. One way to think about a basic blockchain such as bitcoin is that it is an append-only database. Bitcoin can handle approximately seven transactions a second. By comparison, Visa and MasterCard are distributed (but not decentralized) transaction-handling systems that can handle more than 40,000 transactions a second. Blockchain systems continue to increase in speed but typically at with the trade-off of some amount of centralization or restrictions on access. Some PoS systems such as Tendermint or Waveshave a theoretical throughput of over 1,000 tx/second but are still far from the peak capacity of their traditional counterparts.
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昨日阅读3 h
累计 734.5 h