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Jennifer Groff

Jennifer Groff's Public Library

  • The way to use the Inversion Technique is to look at a particular problem from the opposite direction
  • By studying the opposite of what you want, you can identify important elements that aren’t immediately obvious.
  • Here’s the inversion

  • A mental model is a way of looking at the world.
  • Put simply, mental models are the set of tools that you use to think. Each mental model offers a different framework that you can use to look at life
  • Feynman wasn’t necessarily smarter than the math Ph.D. students, he just saw the problem from a different perspective

4 more annotations...

  • First principles is kind of a physics way of looking at the world. You boil things down to the most fundamental truths and say, “What are we sure is true?” … and then reason up from there.
  • Reasoning by first principles is one of the best ways to develop mental models that are rare and useful. Put another way, forcing yourself to look at the fundamental facts of a situation can help you develop your own perspective on how to solve problems rather than defaulting to way the rest of the world thinks.

  • First principles are the origins, main concepts or assumptions that cannot be deduced from anything else.
  • First principles” is a physics way of looking at the world…what that really means is that you boil things down to the most fundamental truths…and then reason up from there…that takes a lot more mental energy 

  • There is a special, valuable communication that occurs between teacher and student, which goes beyond what can be found in any textbook or raw data stream.
  • when computers were trained using 15,000 examples, their predictions were 85 to 87 percent accurate. Pretty good. But when they were fed more than 500,000 examples, they developed more complex rules for tree distribution and boosted the accuracy of their predictions to more than 98 percent
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