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A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
- The Worst Argument in the World
- That Alien Message
- How to Convince Me that 2 + 2 = 3
- Lawful Uncertainty
- Your Intuitions are Not Magic
- The Planning Fallacy
- The Apologist and the Revolutionary
- Scope Insensitivity
- The Allais Paradox (with two followups)
- We Change Our Minds Less Often Than We Think
- The Least Convenient Possible World
- The Third Alternative
- The Domain of Your Utility Function
- Newcomb's Problem and Regret of Rationality
- The True Prisoner's Dilemma
- The Tragedy of Group Selectionism
- Policy Debates Should Not Appear One-Sided
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
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An emulated body in an emulated environment is a disembodied algorithmic system in my terminology. The classic example is Terry Winograd's SHRDLU, which made significant advances in machine language understanding by adding an emulated body (arm) and an emulated world (a cartoon blocks world, but nevertheless a world that could be manipulated) to text-oriented language processing algorithms. However, Winograd himself concluded that language understanding algorithms plus emulated bodies plus emulated worlds aren't sufficient to achieve natural language understanding.
Every emulation necessarily makes simplifying assumptions about both the world and the body that are subject to errors, bugs, and munchkin effects. A physical robot body, on the other hand, is constrained by real-world physics to that which can be built. And the interaction of a physical body with a physical environment necessarily complies with that which can actually happen in the real world. You don't have to know everything about the world in advance, as you would for a realistic world emulation. With a robot body in a physical environment, the world acts as its own model and constrains the universe of computation to a tractable size.
The other thing you get from a physical robot body is the implicit analog computation tools that come with it. A robot arm can be used as a ruler, for example. The torque on a motor can be used as a analog for effort. On these analog systems, world-grounded metaphors can be created using symbolic labels that point to (among other things) the arm-ruler or torque-effort systems. These metaphors can serve as the terminal point of a recursive meaning builder -- and the physics of the world ensures that the results are good enough models of reality for communication to succeed or for thinking to be assessed for truth-with-a-small-t.
OK, thanks for clarifying.
I certainly agree that a physical robot body is subject to constraints that an emulated body may not be subject to; it is possible to design an emulated body that we are unable to build, or even a body that cannot be built even in principle, or a body that interacts with its environment in ways that can't happen in the real world.
And I similarly agree that physical systems demonstrate relationships, like that between torque and effort, which provide data, and that an emulated body doesn't necessarily demonstrate the same relation... (read more)