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"Good tests kill flawed theories; we remain alive to guess again."
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"There is only a perspective seeing, only a perspective "knowing"; and the more affects we allow to speak about one thing, the more eyes, different eyes, we can use to observe one thing, the more complete will our "concept" of this thing, our "objectivity," be."

"Knowledge is invariably a matter of degree: you cannot put your finger upon even the simplest datum and say this we know."

"One of the most important gifts that you can give to yourself is the gift of self-education, that is the best way to grow on constant basis."

"Understand the concept of time and find ways to maximize it effectively."

"Why must ignorance be destroyed? Because it is the number one destroyer of the people of God."

"Oh, my dear Vimes, history changes all the time. It is constantly being re-examined and re-evaluated, otherwise how would we be able to keep historians occupied? We can't possibly allow people with their sort of minds to walk around with time on their hands."
Explore more quotes by Karl Popper

"There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world."

"Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology."

"No rational argument will have a rational effect on a man who does not want to adopt a rational attitude."

"We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure."

"Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve."

"In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality."
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