Deduction vs Induction: Difference and Comparison

Deduction and Induction are two logical terms.

Deduction and Induction are two types of logical reasoning or inference. Logical reasoning refers to the methods by which a conclusion is drawn by the relationship between the premise or premises (premises means the previous statements, which helps for further reasoning or inquiry).

On the basis of evidence and reasoning, both methods are conducted. Both methods conclude their conclusions by the logical argument on the basis of facts, definitions, observations, analysis, etc.

Key Takeaways

  1. A deduction is a process of reasoning from general to specific, while Induction is a process from specific to general.
  2. Deduction involves starting with a hypothesis and using logical deductions to prove it, while Induction involves making observations and generalizing from them.
  3. A deduction is commonly used in mathematics and formal logic, while Induction is commonly used in scientific research and hypothesis testing.

Deduction vs Induction

The difference between Deduction and Induction is that Deduction is decided on the basis of generalizing the existing theory. Whereas, Induction aims at the newly emerging theory for further observations. The deduction depends upon the existing sources or theories from where the conclusion is drawn and on the other hand, the induction depends upon the newly emerging sources and theories to draw the conclusion based on observations of the new sources.

Deduction vs Induction

Deduction refers to the process of generalizing the existing theory for further process of observation to conclude its conclusion. In deduction, the existing idea is observed to get the conclusion. The conclusion in deduction can not be more general than the premises.

On the other hand, Induction refers to the process of concluding a conclusion on the basis of newly emerging facts, theories, observations, etc.

In induction, first, the observations are received, and on the basis of those observations, further analysis is conducted, and hence, we receive the theory. The conclusion in induction is always more general than the premises.

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Comparison Table

Parameters of ComparisonDeductionInduction
Definition Deduction refers to the method of generalizing the existing theory for further observations to conduct the conclusion. Induction refers to the method of conducting its conclusion with the help of newly emerging theories.
PremisesThe conclusion follows the premise for the resultsThe conclusion might not follow the premises for the results
Knowledge It does not give any new knowledge, as it is based on the existing theory It gives new knowledge, as it is based on the newly emerging theory
ProcessThe process of conducting the conclusion in Deduction is quickThe process of conducting the conclusion in Induction is slow
Dependency It depends upon the existing sources and theoriesIt depends upon the new sources or theories
AssociationThe deduction is associated with formal logicInduction is associated with informal logic
Method The deduction is a method of verification Induction is a method of discovery

What is Deduction?

The deduction is a logical argument that is made to conduct the conclusion with the help of the premises. The deduction is also known as deductive inference or reasoning. In deductive inference, the conclusion can not be more general than the premises.

Deductive reasoning moves from general to specific. If the premises of the deduction are true, then the conclusion is said to be true. The deduction is also known as deductive inference or reasoning.

Generally, deductive inference aims only at formal truth. In deductive inference, the conclusion follows necessarily from the premises. So, in a valid deductive inference, if the premises are true, the conclusion must be true.

Example of Deductive reasoning –

1. All dogs bark.

2. Bob is a dog.

3. Therefore, Bob barks.

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deduction

What is Induction?

Induction refers to the logical argument that is done on the basis of newly emerging theories. The induction is also commonly known as inductive inference. The conclusion in inductive inference is always more general than the premises.

In Inductive inference, we pass from particular positions to a general position. The premises are true, as a matter of fact. The induction aims at both formal and material truth.

The conclusion does not necessarily follow the premises. So, the premises of induction may be true, but the conclusion may be false.

Example of Inductive Inference- The coin I pulled from the purse is a two-rupee coin.

Main Differences Between Deduction and Induction

  1. Deduction refers to the method of generalizing the existing theory for further observations to conduct the conclusion. Whereas, Induction refers to the method of conducting its conclusion with the help of newly emerging theories.
  2. The conclusion of a deduction necessarily follows the premises for the results. In contrast, the conclusion of induction might not follow the premises for the results.
  3. Deduction does not give any new knowledge, as it is based on the existing theory. In contrast, induction gives new knowledge, as it is based upon the newly emerging theories.
  4. The process of conducting the conclusion in deduction is quick. In contrast, the process of conducting the conclusion in induction is alow.
  5. The deduction depends upon the existing sources and theories for the conclusion. In contrast, the induction depends upon the new sources and theories for the conclusion.
  6. The deduction is associated with formal logic, whereas the induction is associated with informal logic.
  7. Deduction is the method of verification. Whereas, induction is the method of discovery.
References
  1. https://danielmiessler.com/blog/the-difference-between-deductive-and-inductive-reasoning/#:~:text=Both%20deduction%20and%20induction%20are,by%20observations%20and%20a%20conclusion.
  2. https://www.msubillings.edu/asc/resources/writing/pdf/Induction%20vs%20Deduction.pdf

Last Updated : 31 July, 2023

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10 thoughts on “Deduction vs Induction: Difference and Comparison”

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  3. Thank you for this informative article about deduction and induction. It’s very clear and helpful in understanding the differences between the two methods of logical reasoning.

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  4. The comparison table provided in the article is very helpful in understanding the key differences between deduction and induction. It’s a great resource for anyone studying logic and reasoning.

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