5 Ways to Say Someone is Wrong 1. I’m afraid that’s not quite right. 2. I’m afraid you’re mistaken. 3. No, you’ve got it wrong. 4. No, that’s all wrong. 5. (informal – rude) Baloney. / Bullshit. 5 Ways to Say Someone is Smart 1. He’s really sharp. 2. She’s brilliant. 3. He’s very bright. 4. She’s a genius. 5. He’s a smart cookie.