# logic

/ˈɫɑdʒɪk/ (US) · /lˈɒdʒɪk/ (UK)

Source: https://englishreference.com/word/logic
Updated: 2026-06-19

## Senses

### 1. clear reasoning

noun · CEFR B2

a way of thinking about something that is sensible and based on good reasons.

For teachers: the quality of being justifiable by reason; sound, clear, and sensible thinking.

- There is no logic in spending all your money before you pay your rent.
- The logic behind the government's decision to raise taxes during a recession was questioned by several prominent economists.

### 2. the study of reasoning

noun · CEFR C1 · Academic

the formal study of the rules of reasoning and how to make a valid argument.

For teachers: the branch of philosophy and mathematics that deals with the formal principles of valid inference and demonstration.

- In my first year at university, I took a course on formal logic.
- Aristotelian logic remained the dominant framework for deductive reasoning in the Western world for over two millennia.

### 3. a specific system

noun · CEFR B2

a particular set of rules or ideas used to solve a problem or explain a situation.

For teachers: a specific system of reasoning or a set of principles underlying a particular field or practice.

- I don't understand the logic of this computer program's layout.
- To understand the cultural conflict, one must first grasp the internal logic of each group's belief system.

### 4. electronics

noun · CEFR C1 · Technical

the electronic circuits in a computer that perform basic tasks using 'true' or 'false' signals.

For teachers: the physical arrangement of circuits or gates in a computer or digital system that performs Boolean operations.

- The technician found a fault in the control logic of the motherboard.
- Modern processors integrate billions of transistors to execute complex logic operations at incredible speeds.

### 5. to reason through

verb · CEFR C2 · Formal

to use careful thinking to solve a problem or understand a situation.

For teachers: to apply logical reasoning to a problem or to persuade someone using a logical argument.

- We need to logic out the best way to finish the project on time.
- The detective attempted to logic his way through the suspect's contradictory statements to find the truth.

Usage: Often used with 'out' as in 'to logic something out'.

## Examples

- There is no logic in your argument.
- The company followed a clear logic when they decided to lower prices to attract more customers.
- While the conclusion seems radical, the internal logic of the philosopher's argument remains difficult to refute without questioning his initial premises.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.