This could be the most important blog post you've ever read about resources, by @ToKTeacher:

Propositions are represented by symbols in, for example, formal logic and pure mathematics. We assume they are true in order to find proofs of theorems. @ToKTeacher

The possibility of error is only contained properly within a fallibilist’s framework. It is thus the only robust way of making knowledge. All other options are fragile to falling into the trap of thinking, “error is not possible here.” @ToKTeacher

Most mental models aren’t worth reading or thinking about or listening to because they’re trivial. But the concepts that came out of The Beginning of Infinity are transformational because they very convincingly change the way that you look at what is true and what is not. @naval

We should never attempt to balance anybody’s misery against somebody else’s happiness. — Karl Popper

Despite the crystalline refutation of central planning or the very real knowledge that the free market solved many problems central planners couldn’t, the anti-rational solution and memes of central planning has not gone away. @ToKTeacher

Fallibilism says we cannot have the final truth. Why? We can be wrong, and there is always something to be wrong about. This stands in utter contrast to relativism and dogmatism, which says, “we can have the final truth in hand.” @ToKTeacher

But are there philosophical problems? The present position of English philosophy—my point of departure—originates, I believe, in the late Professor Ludwig Wittgenstein’s doctrine that there are none; that all genuine problems are scientific problems. — Karl Popper

The fight against suffering must be considered a duty, while the right to care for the happiness of others must be considered a privilege confined to the close circle of their friends. — Karl Popper

Take on the right epistemology, and you’ll no longer be tempted to make prophecies. @ToKTeacher

There can be no human society without conflict: such a society would be a society not of friends but of ants. [...] On the other hand, we certainly ought to bring about a reduction of conflict. — Karl Popper

I hold that he who teaches that not reason but love should rule opens up the way for those who rule by hate. — Karl Popper

Critical thinking. Keep in mind the word: critical. It is no accident this word is related to the word “criticism”—for that is the very technique required in critical thinking. @ToKTeacher

The pattern which existed in the past can be postdicted by good explanation. @ToKTeacher

In brief, it is my thesis that human misery is the most urgent problem of a rational public policy and that happiness is not such a problem. — Karl Popper

What we aim at is truth: we test our theories in the hope of eliminating those which are not true. In this way we may succeed in improving our theories–even as instruments: in making nets which are better and better adapted to catch our fish, the real world. — Karl Popper

The possibility of error is only contained properly within a fallibilist’s framework. It is thus the only robust way of making knowledge. All other options are fragile to falling into the trap of thinking, “error is not possible here.” @ToKTeacher

The proper answer to my question ‘How can we hope to detect and eliminate error?’ is I believe, ‘By criticizing the theories or guesses of others and – if we can train ourselves to do so – by criticizing our own theories or guesses.’ — Karl Popper

The harmonic oscillations of society are driven by the creativity of individuals, but damped—sometimes critically—by the force of government. @ToKTeacher

The wealthiest places in the world now are the ones that have the best ideas. Silicon Valley was on top for a while as a wealth creation engine because it had the best ideas. @naval

What is justificationism? Well, it’s the idea that you should try to justify your beliefs as true in some way, then when you have, you have knowledge. @ToKTeacher