The Secret of Neuro-Symbolic AI, Unsupervised Learning, and Natural Language Technologies

[email protected], 03-07-2024

Types of Reasoning in Artificial Intelligence

Symbolic AI, given its rule-based nature, can integrate seamlessly with these pre-existing systems, allowing for a smoother transition to more advanced AI solutions. Companies like Bosch recognize this blend as the next step in AI’s evolution, providing a more comprehensive and context-aware approach to problem-solving, which is vital in critical applications. A similar problem, called the Qualification Problem, occurs in trying to enumerate the preconditions for an action to succeed. An infinite number of pathological conditions can be imagined, e.g., a banana in a tailpipe could prevent a car from operating correctly. The General Problem Solver (GPS) cast planning as problem-solving used means-ends analysis to create plans.

One of the most common applications of symbolic AI is natural language processing (NLP). NLP is used in a variety of applications, including machine translation, question answering, and information retrieval. A key component of the system architecture for all expert systems is the knowledge base, which stores facts and rules for problem-solving.[52]

The simplest approach for an expert system knowledge base is simply a collection or network of production rules.

Understanding, the Chinese Room Argument, and Semantics

So, maybe we are not in a position yet to completely disregard Symbolic AI. Throughout the rest of this book, we will explore how we can leverage symbolic and sub-symbolic techniques in a hybrid approach to build a robust yet explainable model. As we got deeper into researching and innovating the sub-symbolic computing area, we were simultaneously digging another hole for ourselves. Yes, sub-symbolic systems gave us ultra-powerful models that dominated and revolutionized every discipline.

Symbolic AI is a subfield of AI that deals with the manipulation of symbols. Symbolic AI algorithms are designed to deal with the kind of problems that require human-like reasoning, such as planning, natural language processing, and knowledge representation. We introduce the Deep Symbolic Network (DSN) model, which aims at becoming the white-box version of Deep Neural Networks (DNN). The DSN model provides a simple, universal yet powerful structure, similar to DNN, to represent any knowledge of the world, which is transparent to humans.

A simple guide to gradient descent in machine learning

Deductive reasoning is a type of propositional logic in AI, and it requires various rules and facts. It is sometimes referred to as top-down reasoning, and contradictory to inductive reasoning. AI researchers like Gary Marcus have argued that these systems struggle with answering questions like, “Which direction is a nail going into the floor pointing?” This is not the kind of question that is likely to be written down, since it is common sense. Being able to communicate in symbols is one of the main things that make us intelligent.

Deep learning is better suited for System 1 reasoning,  said Debu Chatterjee, head of AI, ML and analytics engineering at ServiceNow, referring to the paradigm developed by the psychologist Daniel Kahneman in his book Thinking Fast and Slow. If I tell you that I saw a cat up in a tree, your mind will quickly conjure an image. There are specific tasks in industries where predefined logic is paramount. Symbolic AI can handle these tasks optimally, where purely connectionist approaches might falter. 2) The two problems may overlap, and solving one could lead to solving the other, since a concept that helps explain a model will also help it recognize certain patterns in data using fewer examples.

Regarding implementing symbolic AI, one of the oldest, yet still, the most popular, logic programming languages is Prolog comes in handy. Prolog has its roots in first-order logic, a formal logic, and unlike many other programming languages. The advantage of neural networks is that they can deal with messy and unstructured data. Instead of manually laboring through the rules of detecting cat pixels, you can train a deep learning algorithm on many pictures of cats. When you provide it with a new image, it will return the probability that it contains a cat. To summarize, one of the main differences between machine learning and traditional symbolic reasoning is how the learning happens.

• Japan championed Prolog for its Fifth Generation Project, intending to build special hardware for high performance.
• Nature provides a set of mechanisms that allow us to interact with the environment, a set of tools for extracting knowledge from the world, and a set of tools for exploiting that knowledge.
• Right now, AIs have crushed humans at every single important game, from chess to Jeopardy!
• By definition, unsupervised learning doesn’t involve labeled training data and uses techniques like clustering to identify categories or patterns in data.
• However, the methodology and the mindset of how we approach AI has gone through several phases throughout the years.
• In practice, the effectiveness of Symbolic AI integration with legacy systems would depend on the specific industry, the legacy system in question, and the challenges being addressed.

“Symbolic AI allows you to use logic to reason about entities and their properties and relationships. Neuro-symbolic systems combine these two kinds of AI, using neural networks to bridge from the messiness of the real world to the world of symbols, and the two kinds of AI in many ways complement each other’s strengths and weaknesses. I think that any meaningful step toward general AI will have to include symbols or symbol-like representations,” he added.

Their proposed technique, LogiCoT, enhances LLMs with logical reasoning capabilities using a simple but effective principle called reductio ad absurdum. That is, until they realize how much time and money it saves them while mastering almost every aspect of natural language technologies—particularly question asking and answering. We typically use predicate logic to define these symbols and relations formally – more on this in the A quick tangent on Boolean logic section later in this chapter.

Symbolic AI is more concerned with representing the problem in symbols and logical rules (our knowledge base) and then searching for logic. In Symbolic AI, we can think of logic as our problem-solving technique and symbols and rules as the means to represent our problem, the input to our problem-solving method. The natural question that arises now would be how one can get to logical computation from symbolism. To properly understand this concept, we must first define what we mean by a symbol. The Oxford Dictionary defines a symbol as a “Letter or sign which is used to represent something else, which could be an operation or relation, a function, a number or a quantity.” The keywords here represent something else.

When you have huge amounts of carefully curated data, you can achieve remarkable things with them, such as superhuman accuracy and speed. Right now, AIs have crushed humans at every single important game, from chess to Jeopardy! If you want a machine to learn to do something intelligent you either have to program it or teach it to learn. We can’t really ponder LeCun and Browning’s essay at all, though, without first understanding the peculiar way in which it fits into the intellectual history of debates over AI.

• The premise behind Symbolic AI is using symbols to solve a specific task.
• This rule-based symbolic AI required the explicit integration of human knowledge and behavioural guidelines into computer programs.
• In contrast to the US, in Europe the key AI programming language during that same period was Prolog.

Without an innate capacity for structured logical reasoning, LLMs hallucinate or nonsensical information. Their reasoning lacks the constraints of formal logic that guide systematic thinking in humans. Artificial Intelligence may possibly be the single most misunderstood concept in contemporary data management. Most organizations are unclear about the relationship of AI to machine learning (they’re far from synonyms) and distinctions between supervised and unsupervised learning (which has nothing to do with monitoring results or human-in-the-loop).

Democratizing the hardware side of large language models

Finally, their operation is largely opaque to humans, rendering them unsuitable for domains in which verifiability is important. In this paper, we propose an end-to-end reinforcement learning architecture comprising a neural back end and a symbolic front end with the potential to overcome each of these shortcomings. As proof-of-concept, we present a preliminary implementation of the architecture and apply it to several variants of a simple video game.

Problems were discovered both with regards to enumerating the preconditions for an action to succeed and in providing axioms for what did not change after an action was performed. Similarly, Allen’s temporal interval algebra is a simplification of reasoning about time and Region Connection Calculus is a simplification of reasoning about spatial relationships. Qualitative simulation, such as Benjamin Kuipers’s QSIM,[89] approximates human reasoning about naive physics, such as what happens when we heat a liquid in a pot on the stove. We expect it to heat and possibly boil over, even though we may not know its temperature, its boiling point, or other details, such as atmospheric pressure. A more flexible kind of problem-solving occurs when reasoning about what to do next occurs, rather than simply choosing one of the available actions. This kind of meta-level reasoning is used in Soar and in the BB1 blackboard architecture.

A Symbolic AI system is said to be monotonic – once a piece of logic or rule is fed to the AI, it cannot be unlearned. Newly introduced rules are added to the existing knowledge, making Symbolic AI significantly lack adaptability and scalability. One power that the human mind has mastered over the years is adaptability. Humans can transfer knowledge from one domain to another, adjust our skills and methods with the times, and reason about and infer innovations. For Symbolic AI to remain relevant, it requires continuous interventions where the developers teach it new rules, resulting in a considerably manual-intensive process. Surprisingly, however, researchers found that its performance degraded with more rules fed to the machine.

Symbolic AI algorithms have played an important role in AI’s history, but they face challenges in learning on their own. After IBM Watson used symbolic reasoning to beat Brad Rutter and Ken Jennings at Jeopardy in 2011, the technology has been eclipsed by neural networks trained by deep learning. This approach involves the fusion of deep learning neural network topologies with symbolic reasoning techniques, thereby elevating the sophistication of AI beyond its traditional counterparts. For example, neural networks have proven effective in identifying an item’s shape or color.

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