Definition

1. Noun:
   • A logical process of reasoning from one or more general statements (premises) to reach a logically certain conclusion: Deductive reasoning moves from broad principles or theories to specific, necessary conclusions. If the premises are true, the conclusion must also be true.
   • Reasoning from the general to the particular (or from cause to effect): It involves applying a general rule to a specific case to deduce a result.

Usage and Examples

• Noun:
  • Mathematical proofs are classic examples of deductive reasoning.
  • The detective used deductive reasoning, starting from the general principle that the culprit must have been at the scene, to conclude the butler was guilty.
  • In philosophy, deductive reasoning is essential for constructing valid arguments.

Advanced Usage

• "To apply deductive reasoning": To use this logical method to solve a problem or analyze a situation.
  • To solve the puzzle, you need to apply deductive reasoning.
• "A chain of deductive reasoning": A series of logical deductions where each conclusion becomes a premise for the next.
  • Her solution was based on a long chain of deductive reasoning.

Variants and Related Words

• Deduce (verb): To reach a conclusion through deductive reasoning.
  • From the evidence, we can deduce that he arrived before midnight.
• Deductive (adjective): Relating to or using deduction.
  • She has a strong deductive mind.
• Deduction (noun): The process of deducing or the conclusion reached.
  • His deduction was correct based on the available facts.

Synonyms

• Logical deduction: The process of reasoning logically from premises to a conclusion.
• Syllogistic reasoning: Reasoning that uses syllogisms (a form of deductive argument consisting of a major premise, a minor premise, and a conclusion).

Related Phrases and Concepts

• Deductive argument: An argument intended to provide logically conclusive support for its conclusion.
  • A valid deductive argument guarantees the truth of the conclusion if the premises are true.
• Deductive logic: The branch of logic concerned with the principles of deductive reasoning.
  • The course covers the fundamentals of deductive logic.

Noun

1. reasoning from the general to the particular (or from cause to effect)