1 sentence

1. 只是因为你还没有看到一只黑天鹅，并不意味着没有黑天鹅。

   zhǐ​shì​yīn​wèi nǐ hái​méi​yǒu kàn dào yī zhī hēi tiān'é, bìng​bù yì​wèi​zhe méi​yǒu hēi tiān'é.

   Just because you haven’t seen a black swan, doesn’t mean that there are no black swans.

   Source: CCMatrix