Definition

Examples

• 他问了半天也没问出个所以然来。
  Tā wèn le bàntiān yě méi wèn chū ge suǒ yǐ rán lái.
  He asked for a long time but couldn't get any clear answer as to why.
• 这件事的所以然，连专家也说不清楚。
  Zhè jiàn shì de suǒ yǐ rán, lián zhuānjiā yě shuō bù qīngchu.
  Even experts can't explain the whys and wherefores of this matter.
• 你要是真想知道所以然，就自己去查资料。
  Nǐ yàoshi zhēn xiǎng zhīdào suǒ yǐ rán, jiù zìjǐ qù chá zīliào.
  If you really want to know the reasons, go look up the materials yourself.