B2 adjective #8,000 가장 일반적인 3분 분량

deduce

To figure something out by thinking about the facts you already know.

Explanation at your level:

You use deduce when you are like a detective. You see a clue, and you find the answer. For example, if you see a wet coat, you know it is raining. You used the clue to know the answer. This is called 'deducing'.

When you deduce, you think about facts to find an answer. If your friend is not at school, you look at your schedule and see it is a holiday. You deduce that your friend is at home. It is a smart way to solve problems.

To deduce means to reach a conclusion by thinking logically. It is more formal than 'figuring out'. We use it when we have evidence. For example, 'From the footprints, the police deduced that the thief ran toward the park.' It shows you are thinking carefully.

Deduce is used when you arrive at a logical conclusion based on available evidence. It is common in academic writing or professional discussions. Unlike 'guessing', which is random, 'deducing' requires a clear path of reasoning. You might deduce a person's mood from their body language or deduce a company's success from their financial reports.

In advanced English, deduce implies a rigorous analytical process. It is often used in scientific or investigative contexts where one infers specific truths from general principles. When you deduce, you are essentially reverse-engineering a situation to understand its cause. It is a key term in critical thinking, distinguishing between mere intuition and evidence-based reasoning.

The verb deduce carries a nuance of intellectual precision. It is the hallmark of the deductive method, famously championed by figures like Sherlock Holmes, where one works backward from observations to establish a necessary truth. Its usage suggests a high level of cognitive effort and the presence of sufficient data to support a definitive conclusion. In literary or philosophical discourse, it is often contrasted with 'induction', where one moves from specific observations to general theories. To 'deduce' is to demonstrate command over logic.

30초 단어

  • Deduce means to use logic to find an answer.
  • It is different from guessing.
  • It requires evidence or facts.
  • It is a formal, academic word.

Have you ever played detective? When you deduce something, you are acting like a real-life Sherlock Holmes. It is the process of using the information you already have to reach a smart, logical conclusion about something new.

Think of it as connecting the dots. If you see someone walking inside with a wet umbrella, you can deduce that it is raining outside, even if you cannot see the sky yourself. It is not guessing; it is using evidence to figure out the truth.

This word is very useful in school, work, and everyday life. Whenever you see a situation and think, 'Based on what I see here, it must be that...', you are deducing. It is a powerful thinking skill that helps us understand the world without needing someone to explain every single detail to us.

The word deduce comes from the Latin word deducere. If we break that down, de- means 'down' or 'away' and ducere means 'to lead'. So, literally, it means to 'lead down' or 'bring down' a conclusion from a starting point.

It entered the English language in the late 16th century. Back then, it was often used in legal and philosophical contexts to describe how one truth could be brought out of another. Over time, it became a common way to describe any kind of logical reasoning.

It shares a family root with words like conduct, induce, and produce. All these words involve the Latin root ducere, which is all about guiding, leading, or bringing something forth. It is fascinating how a word about 'leading' became our go-to term for 'thinking'!

You will mostly hear deduce in formal or academic settings. It sounds a bit more intellectual than just saying 'figure out' or 'guess'. You might use it when writing an essay or explaining a complex problem at work.

Common phrases include 'deduce from' (e.g., 'I deduced from his tone that he was upset') and 'logically deduce'. It is often paired with words like evidence, facts, and information.

While 'figure out' is perfect for casual chats with friends, 'deduce' is the word you want when you want to sound precise and analytical. It carries a sense of weight—like you have actually put some serious thought into your answer rather than just taking a wild shot in the dark.

While 'deduce' itself isn't an idiom, it is closely related to expressions about thinking:

  • Put two and two together: This means to deduce the truth by looking at the facts.
  • Read between the lines: To deduce a hidden meaning that isn't explicitly stated.
  • Jump to conclusions: The opposite of deducing; it means deciding something without enough evidence.
  • See the writing on the wall: To deduce that something bad is likely to happen based on current signs.
  • Connect the dots: Similar to deducing, it means seeing how different pieces of information relate to each other.

Deduce is a verb. Its past tense is deduced and its present participle is deducing. The noun form is deduction, and the adjective form is deductive.

In terms of pronunciation, it is /dɪˈdjuːs/ in British English and /dɪˈduːs/ in American English. The stress is on the second syllable. It rhymes with words like produce, reduce, and seduce.

When using it in a sentence, we usually follow it with a 'that' clause or a prepositional phrase starting with 'from'. For example: 'We deduced that the store was closed' or 'He deduced the answer from the clues provided'.

Fun Fact

It shares the same root as 'duke', meaning a leader.

Pronunciation Guide

UK dɪˈdjuːs

sounds like di-dyoos

US dɪˈduːs

sounds like di-doos

Common Errors

  • pronouncing the 'u' like 'uh'
  • stressing the first syllable
  • confusing with 'deduct'

Rhymes With

produce reduce seduce induce introduce

Difficulty Rating

독해 3/5

Moderate

Writing 4/5

Formal

Speaking 3/5

Academic

듣기 3/5

Formal

What to Learn Next

Prerequisites

think know fact clue

Learn Next

deduction inference reasoning logical

고급

analytical empirical rationalize

Grammar to Know

Verb Tenses

I deduce, I deduced

That Clauses

I deduce that...

Prepositional Phrases

deduce from...

Examples by Level

1

I see a wet umbrella, so I deduce it is raining.

wet umbrella = rain

Verb + that clause

2

He sees the clues and deduces the answer.

clues = answer

Third person singular

3

We can deduce the truth from this.

truth from facts

Modal verb can

4

She deduced who took the toy.

found the person

Past tense

5

Can you deduce the secret?

find the secret

Question form

6

They deduced it was time to go.

time to leave

Past tense

7

I deduce that you are hungry.

you look hungry

Present simple

8

The dog deduced where the food was.

found the food

Past tense

1

I deduced the answer from the hints.

2

She deduced that he was tired.

3

We deduced the location on the map.

4

Can you deduce the meaning of this word?

5

He deduced the plan from the notes.

6

They deduced the cause of the noise.

7

I deduced it was late by the dark sky.

8

She deduced the truth easily.

1

The detective deduced the thief's identity.

2

We can deduce the age of the tree from its rings.

3

He deduced that the meeting had been cancelled.

4

She deduced from his silence that he disagreed.

5

Scientists deduced the existence of the planet.

6

I deduced the password from the clues.

7

They deduced the outcome based on previous data.

8

Can you deduce the motive for his actions?

1

One can deduce that the economy is improving.

2

She deduced the solution through careful analysis.

3

The police deduced the direction of the escape.

4

He deduced from the evidence that it was an accident.

5

We deduced the author's intent from the text.

6

It is hard to deduce the truth from these rumors.

7

They deduced that the system was faulty.

8

The team deduced the best strategy to win.

1

The scholar deduced the meaning from the context.

2

We deduced a pattern from the chaotic data.

3

He deduced the hidden agenda behind the proposal.

4

She deduced the structural integrity of the bridge.

5

The logic allowed us to deduce the final result.

6

One might deduce that the project is doomed.

7

They deduced the cause of the error after testing.

8

The evidence led them to deduce a new theory.

1

His argument allows one to deduce a broader principle.

2

She deduced the underlying motive with uncanny accuracy.

3

The detective deduced the culprit's location from a receipt.

4

We deduced the chemical composition of the sample.

5

One must deduce the necessity of the action from the law.

6

The philosopher deduced the nature of the mind.

7

They deduced the existence of the error in the code.

8

The data allowed them to deduce a clear trend.

자주 쓰는 조합

logically deduce
deduce from
deduce the truth
deduce a conclusion
correctly deduce
easily deduce
deduce the meaning
deduce the cause
deduce from evidence
deduce a pattern

Idioms & Expressions

"Put two and two together"

To deduce the truth from clues

I saw them together and put two and two together.

casual

"Read between the lines"

To deduce hidden meaning

Reading between the lines, he is unhappy.

neutral

"Jump to conclusions"

To guess without facts

Don't jump to conclusions.

neutral

"Connect the dots"

To see the relationship between facts

Once I connected the dots, I understood.

neutral

"See the writing on the wall"

To deduce a bad outcome

He saw the writing on the wall and quit.

idiomatic

"A lightbulb moment"

When you suddenly deduce the answer

I had a lightbulb moment.

casual

Easily Confused

deduce vs deduct

similar spelling

deduct is for subtraction, deduce is for logic

I will deduct the cost; I will deduce the cause.

deduce vs infer

similar meaning

infer is drawing a conclusion, deduce is reasoning from facts

I inferred he was sad; I deduced he was sad from his tears.

deduce vs induce

similar sound

induce means to cause something to happen

The medicine induced sleep; I deduced the cause of his illness.

deduce vs reduce

rhyme

reduce means to make smaller

I will reduce the price; I will deduce the truth.

Sentence Patterns

B1

I deduce that + clause

I deduce that he is lying.

B2

We deduce X from Y

We deduce the answer from the facts.

B2

It is possible to deduce...

It is possible to deduce the truth.

C1

He deduced the reason for...

He deduced the reason for the delay.

C2

One can deduce...

One can deduce a lot from his behavior.

어휘 가족

Nouns

deduction the process of deducing

Verbs

deduce to reason

Adjectives

deductive using deduction

관련

deduct often confused but means to subtract

How to Use It

frequency

7

Formality Scale

Formal Neutral Casual Slang

자주 하는 실수

Using deduce for random guessing Use 'guess'
Deduce requires evidence.
Deduce vs. Induce Deduce is logical, Induce is to cause
They are different words.
Forgetting the preposition Deduce from
You deduce something FROM facts.
Using as an adjective Use 'deductive'
Deduce is a verb.
Confusing with deduct Deduct is to subtract
Deduce is to reason.

Tips

💡

Memory Palace

Imagine a detective office.

💡

Native Speakers

Use it in formal essays.

🌍

Sherlock Holmes

He is the master of deduction.

💡

Preposition

Always use 'from' after deduce.

💡

The 'u' sound

Mind the British 'yoo' sound.

💡

Deduct vs Deduce

Deduct = money, Deduce = logic.

💡

Etymology

It means to lead.

💡

Flashcards

Use 'deduce' in a sentence.

💡

Verb form

It is a regular verb.

💡

Formal vs Casual

Use 'figure out' for friends.

Memorize It

Mnemonic

DE-DUCE: DE-tectives DUCE (do) logic.

Visual Association

A detective with a magnifying glass.

Word Web

logic evidence detective reasoning truth

챌린지

Try to deduce one thing about a friend today based on their clothes.

어원

Latin

Original meaning: to lead down

문화적 맥락

None

Common in academic and detective fiction.

Sherlock Holmes stories Agatha Christie novels

Practice in Real Life

Real-World Contexts

At school

  • deduce the answer
  • deduce the formula
  • deduce the meaning

At work

  • deduce the cause of the problem
  • deduce the trend
  • deduce the client's needs

Reading mysteries

  • deduce the killer
  • deduce the motive
  • deduce the clues

Scientific research

  • deduce a theory
  • deduce the result
  • deduce from data

Conversation Starters

"How do you deduce the truth in a difficult situation?"

"Do you think you are good at deducing things?"

"Who is the most famous detective who uses deduction?"

"Can you deduce why it might be raining today?"

"What is the difference between guessing and deducing?"

Journal Prompts

Write about a time you had to deduce the answer to a mystery.

Describe a situation where you deduced something incorrectly.

Why is deduction important in science?

How does Sherlock Holmes use deduction?

자주 묻는 질문

8 질문

No, it is based on evidence.

Yes, but it is formal.

They are very similar, but infer is often used for reading between the lines.

Yes.

di-dyoos or di-doos.

Deduction.

It is common in professional contexts.

No, you usually deduce a fact or a conclusion.

셀프 테스트

fill blank A1

I ___ that it is raining because of the wet ground.

정답! 아쉬워요. 정답: deduce

Deduce is the logical choice.

multiple choice A2

Which word means to use facts to find an answer?

정답! 아쉬워요. 정답: deduce

Deduce is the correct term.

true false B1

Deduce means to guess without any evidence.

정답! 아쉬워요. 정답: 거짓

Deduce requires evidence.

match pairs B1

Word

All matched!

Matching synonyms and antonyms.

sentence order B2

아래 단어를 탭해서 문장을 만들어 보세요
정답! 아쉬워요. 정답:

I deduced the truth.

fill blank B2

We can ___ the answer from the data.

정답! 아쉬워요. 정답: deduce

Deduce fits the context of logic.

true false C1

Deduce and Deduct are the same word.

정답! 아쉬워요. 정답: 거짓

Deduce is for logic, Deduct is for math.

multiple choice C1

What is the noun form of deduce?

정답! 아쉬워요. 정답: deduction

Deduction is the noun.

sentence order C2

아래 단어를 탭해서 문장을 만들어 보세요
정답! 아쉬워요. 정답:

We deduced it from the evidence.

fill blank C2

His ___ reasoning allowed him to solve the case.

정답! 아쉬워요. 정답: deductive

Deductive is the adjective.

점수: /10

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