Difference Between Deductive And Inductive Reasoning PdfBy Nick B. In and pdf 30.03.2021 at 18:41 8 min read
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Reasoning in artificial intelligence has two important forms, Inductive reasoning, and Deductive reasoning. Both reasoning forms have premises and conclusions, but both reasoning are contradictory to each other.
Most everyone who thinks about how to solve problems in a formal way has run across the concepts of deductive and inductive reasoning. Both deduction and induction help us navigate real-world problems, such as who committed a crime, the most likely cause of an accident, or how many planets might contain life in the Milky Way galaxy.
Inductive vs. deductive reasoning
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Deductive reasoning, or deduction , is making an inference based on widely accepted facts or premises. If a beverage is defined as "drinkable through a straw," one could use deduction to determine soup to be a beverage. Inductive reasoning, or induction , is making an inference based on an observation, often of a sample.
You can induce that the soup is tasty if you observe all of your friends consuming it. Abductive reasoning, or abduction , is making a probable conclusion from what you know. If you see an abandoned bowl of hot soup on the table, you can use abduction to conclude the owner of the soup is likely returning soon. Do you have to figure out what time you need to leave your house for an appointment?
Or are you trying to decide the best choice for lunch? Or are you baffled about why a half-eaten sandwich is on the counter? These situations call for some method of reasoning, and there are three that we use daily: deduction , induction , and abduction. In abductive reasoning, the major premise is evident, but the minor premise and therefore the conclusion are only probable. For example, if you find a half-eaten sandwich in your home, you might use probability to reason that your teenage son made the sandwich, realized he was late for work, and abandoned it before he could finish it.
Deduction is generally defined as "the deriving of a conclusion by reasoning. It occurs when you are planning out trips, for instance. Say you have a 10 o'clock appointment with the dentist and you know that it takes 30 minutes to drive from your house to the dentist's. From those two facts, you deduce that you will have to leave your house at , at the latest, to be at the dentist's on time. Deductive reasoning always follows necessarily from general or universal premises.
If a sandwich is defined as "two or more slices of bread or a split roll having a filling in between," and a hot dog is defined as "a frankfurter; especially : a frankfurter heated and served in a long split roll" then one must deduce that any hot dog served in a split roll is a sandwich. Whereas in deduction the truth of the conclusion is guaranteed by the truth of the statements or facts considered the hot dog is served in a split roll and a split roll with a filling in the middle is a sandwich , induction is a method of reasoning involving an element of probability.
In logic, induction refers specifically to "inference of a generalized conclusion from particular instances. For example, at lunch you observe 4 of your 6 coworkers ordering the same sandwich. From your observation, you then induce that the sandwich is probably good—and you decide to try it yourself. Induction is at play here since your reasoning is based on an observation of a small group, as opposed to universal premises. The third method of reasoning, abduction , is defined as "a syllogism in which the major premise is evident but the minor premise and therefore the conclusion only probable.
A familiar example of abduction is a detective's identification of a criminal by piecing together evidence at a crime scene. In an everyday scenario, you may be puzzled by a half-eaten sandwich on the kitchen counter. Abduction will lead you to the best explanation. Your reasoning might be that your teenage son made the sandwich and then saw that he was late for work.
In a rush, he put the sandwich on the counter and left. If you have trouble differentiating deduction , induction , and abduction , thinking about their roots might help. All three words are based on Latin ducere , meaning "to lead. The prefix in- means "to" or "toward," and induction leads you to a generalization.
The prefix ab- means "away," and you take away the best explanation in abduction. Become a master without leaving home! Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! We're intent on clearing it up. We're gonna stop you right there. How to use a word that literally drives some pe The awkward case of 'his or her'.
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February Words of the Day Quiz. Usage Notes 'Deduction' vs. What to Know Deductive reasoning, or deduction , is making an inference based on widely accepted facts or premises. More Words At Play. Love words? Need even more definitions? We're intent on clearing it up 'Nip it in the butt' or 'Nip it in the bud'?
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Learn the difference between the two types of reasoning and how to use them when evaluating facts and arguments. As odd as it sounds, in science, law, and many other fields, there is no such thing as proof — there are only conclusions drawn from facts and observations. Scientists cannot prove a hypothesis, but they can collect evidence that points to its being true. The question of what makes something true is more relevant than ever in this era of alternative facts and fake news. This article explores truth — what it means and how we establish it.
Published on April 18, by Raimo Streefkerk. Revised on November 11, The main difference between inductive and deductive reasoning is that inductive reasoning aims at developing a theory while deductive reasoning aims at testing an existing theory. Inductive reasoning moves from specific observations to broad generalizations, and deductive reasoning the other way around. Table of contents Inductive research approach Deductive research approach Combining inductive and deductive research.
During the scientific process, deductive reasoning is used to reach a logical true conclusion. Another type of reasoning, inductive, is also used. Often, people confuse deductive reasoning with inductive reasoning, and vice versa. It is important to learn the meaning of each type of reasoning so that proper logic can be identified. Deductive reasoning is a basic form of valid reasoning. Deductive reasoning, or deduction, starts out with a general statement, or hypothesis, and examines the possibilities to reach a specific, logical conclusion, according to California State University. The scientific method uses deduction to test hypotheses and theories.
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Deductive Reasoning vs. Inductive Reasoning
When assessing the quality of an argument , we ask how well its premises support its conclusion. More specifically, we ask whether the argument is either deductively valid or inductively strong. An argument in which the premises do succeed in guaranteeing the conclusion is called a deductively valid argument.
The main difference between inductive and deductive approaches to research is that whilst a deductive approach is aimed and testing theory, an inductive approach is concerned with the generation of new theory emerging from the data. A deductive approach usually begins with a hypothesis, whilst an inductive approach will usually use research questions to narrow the scope of the study. For deductive approaches the emphasis is generally on causality, whilst for inductive approaches the aim is usually focused on exploring new phenomena or looking at previously researched phenomena from a different perspective. Inductive approaches are generally associated with qualitative research, whilst deductive approaches are more commonly associated with quantitative research.
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