有理有据 (yǒu lǐ yǒu jù) — well-grounded, with both reason and evidence

Definition

Examples

• 他的分析有理有据，让人不得不信服。
  Tā de fēn xī yǒu lǐ yǒu jù, ràng rén bù dé bú xìn fú.
  His analysis is well-grounded and makes people convinced.
• 写论文时一定要做到有理有据。
  Xiě lùn wén shí yí dìng yào zuò dào yǒu lǐ yǒu jù.
  When writing a thesis, you must make sure it's well-grounded.
• 她说话有理有据，大家都愿意听她的建议。
  Tā shuō huà yǒu lǐ yǒu jù, dà jiā dōu yuàn yì tīng tā de jiàn yì.
  She speaks with reason and evidence, so everyone is willing to listen to her advice.