How to say "I don't believe you" politely: 9 lines from movies

Hana and Nadia, animated characters from the MicroEnglish Short: How to say "I don't believe you" politely: 9 lines from movies

Read the full lesson on MicroEnglish (free): the video, tone notes for every line, example dialogues and a quiz.

To doubt someone politely, ask a question instead of making a judgment. "Are you sure you're okay?" and "Can you explain that?" give the other person a chance to rethink or add details. When you need to be clear but calm, say "I'm not convinced."

Watch the Short

Hana doesn't accept Nadia's excuse about three exclamation marks and says it straight: "I don't believe you." Nadia blames a very excited laptop. Later Hana tries a softer question, "Are you sure it was an accident?", and this time Nadia admits a little more. Watch the Short to hear how a gentle question works better than a direct accusation.

https://www.youtube.com/shorts/R9q0R-huif8

Watch it on YouTube

The lines at a glance

  1. Are you sure you're okay? (Gentle, open question)
  2. Can you explain that? (Polite and curious)
  3. I'm not convinced. (Calm but firm)
  4. Are you sure about that? (Light, questioning)
  5. I find that hard to believe. (Polite but doubtful)
  6. That doesn't sound right to me. (Soft, personal doubt)
  7. Is that really what happened? (Curious, a little skeptical)
  8. Really? That's surprising. (Friendly, mild doubt)
  9. I'd like to see that for myself. (Calm, practical)

1. Are you sure you're okay?

Tone: Gentle, open question

Use it when someone says they're fine but you think they aren't. It gives them a chance to rethink. Don't use it about facts or numbers; it's about how a person feels.

In the film Black or White (2014):

Papa, are you sure you're okay?

For example:

A: I'm fine. I just didn't sleep much.

B: Are you sure you're okay? You look really tired.

A: Well, maybe I'm a little stressed.

2. Can you explain that?

Tone: Polite and curious

Use it when a story or claim doesn't make sense to you and you want details, not a fight. Say it in a calm voice. A sharp tone can make it sound like an accusation.

In the film Dracula: Dead and Loving It (1995):

Can you explain that?

For example:

A: The report is late because the printer deleted it.

B: Can you explain that? I didn't know printers could delete files.

A: Okay, I forgot to save it.

3. I'm not convinced.

Tone: Calm but firm

Use it when you've heard the explanation and you still have doubts. Convinced means sure that something is true. It's clear and honest, so use it when you're ready to say what you think.

In the film The Rescuers Down Under (1990):

I'm not convinced.

For example:

A: This plan will save us a lot of money.

B: I'm not convinced. Can we look at the numbers again?

4. Are you sure about that?

Tone: Light, questioning

Use it when you think a fact or detail may be wrong. It's softer than "That's not true." With friends it can sound playful; with a manager, keep your voice neutral.

For example:

A: The meeting starts at ten.

B: Are you sure about that? The email said nine.

A: Oh, let me check.

5. I find that hard to believe.

Tone: Polite but doubtful

Use it when a claim seems very unlikely. It's more direct than a question, so it fits when you want the person to know you have real doubts. It can sound cold if you say it to a friend who is upset.

For example:

A: I finished the whole book in one hour.

B: I find that hard to believe. It's four hundred pages.

6. That doesn't sound right to me.

Tone: Soft, personal doubt

Use it to question information without saying the other person is lying. The words "to me" make it your opinion. It works well at work and in groups.

For example:

A: We only sold ten tickets last week.

B: That doesn't sound right to me. I think it was closer to fifty.

A: You might be right. I'll look again.

7. Is that really what happened?

Tone: Curious, a little skeptical

Use it when someone tells a story and some part seems missing. It invites them to tell the full story. Avoid it in formal complaints, where it can sound like blame.

For example:

A: The cat broke the vase all by itself.

B: Is that really what happened?

A: Fine. I helped a little.

8. Really? That's surprising.

Tone: Friendly, mild doubt

Use it in casual talk when something surprises you and you're not fully sure it's true. It keeps the mood friendly. It's too weak if you need to question something serious.

For example:

A: I've never been late to work.

B: Really? That's surprising. Not even once?

9. I'd like to see that for myself.

Tone: Calm, practical

Use it when you want proof, such as a document, a photo, or a result. It sounds reasonable, not angry. Don't use it about someone's feelings.

For example:

A: The new version is twice as fast.

B: Great. I'd like to see that for myself. Can you show me a test?

Common mistakes

Not quite: I'm not convince.
Better: I'm not convinced.
Convinced is an adjective here and needs the -ed ending. "Convince" is the verb, as in "Can you convince me?"

Not quite: Can you explain me that?
Better: Can you explain that? / Can you explain that to me?
Explain doesn't take a person directly after it. Put the thing first, then add "to me" if you want.

Not quite: Saying "I don't believe you" to a manager or client.
Better: That doesn't sound right to me. Can you explain that?
"I don't believe you" can sound like you're calling the person a liar. A question or a personal opinion keeps the conversation open.

Quick quiz

1. A friend says they're fine, but they look upset. Which line is the most gentle?

  1. I'm not convinced.
  2. Are you sure you're okay?
  3. I find that hard to believe.
  4. I'd like to see that for myself.

2. What does "convinced" mean in "I'm not convinced"?

  1. Angry about something
  2. Sure that something is true
  3. Ready to leave

3. A coworker's explanation doesn't make sense. You want details, not an argument. What do you say?

  1. Can you explain that?
  2. I don't believe you.
  3. That's a lie.

4. Which line sounds the most firm but still calm?

  1. Really? That's surprising.
  2. Is that really what happened?
  3. I'm not convinced.

5. Why does "That doesn't sound right to me" feel polite?

  1. It uses a question.
  2. "To me" makes it your opinion, not an accusation.
  3. It's very informal.

Practise with MicroEnglish lessons

Questions learners ask

Is "I don't believe you" rude in English?

It isn't always rude, but it's very direct. Between close friends it can sound playful. With coworkers, clients, or people you don't know well, a question like "Are you sure about that?" or "Can you explain that?" is safer.

What's a formal way to say "I don't believe you"?

"I'm not convinced" and "I find that hard to believe" both work in formal settings. You can add a next step to keep things polite. For example: I'm not convinced. Could we look at the data together?

What's the difference between "I'm not sure" and "I'm not convinced"?

"I'm not sure" often means you don't know. "I'm not convinced" means someone tried to show you something is true, and you still have doubts. It's firmer and fits after you've heard an explanation.

How can I sound less aggressive when I doubt someone?

Ask instead of tell, and keep your voice calm. Words like "to me" and "really" make your doubt sound personal and curious. Giving the person a chance to explain usually gets you a more honest answer.

Quiz answers

  1. Are you sure you're okay? It's an open question about feelings that lets your friend rethink their answer.
  2. Sure that something is true. If you're not convinced, you're not sure that what you heard is true.
  3. Can you explain that? It asks for more information in a polite, curious way.
  4. I'm not convinced. It states your doubt clearly without blaming the other person.
  5. "To me" makes it your opinion, not an accusation. You question the information while showing it's only how you see it.

Film lines are short quotes for language teaching; the dialogue belongs to its rightsholders. Hana and Nadia are animated characters made with Google Flow. More from MicroEnglish: all our channels.

Read the full lesson on MicroEnglish (free): the video, tone notes for every line, example dialogues and a quiz.

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