打開網路媒體、社群網站，就能發現網路世界上充斥著滿滿的情緒性字眼，情緒已成為理解這個世界最優先的方法，因此有許多人、媒體利用這樣的趨勢來操控其他人，例如創造假新聞來誤導大眾，進而影響選舉結果，理性批判在這樣的社會是否已發揮不了作用？

數學專家鄭樂雋在這本書中說明了邏輯、理性批判可以幫助我們更清楚更有條理地分析狀況，希望讓社會大眾可以擺脫情緒的束縛，釐清許多吵得沸沸揚揚的議題背後的真相。

但邏輯並非無敵，有時還是會成為情緒的獵物，這也是為何鄭樂雋至今還是會害怕坐飛機、偶爾還是會吃過多的餅乾。

如果可以適當地將邏輯和情緒搭檔使用，就可以破解偏執、誤導、刻意操控的魔咒，看透事件的本質。

鄭樂雋是英國雪菲爾德大學的數學講師，人生志向是解除大眾對數學的恐懼，曾結合自己的專業和烘培興趣，出版《如何烤一個數學Pi》。

Emotions are powerful. In newspaper headlines and on social media, they have become the primary way of understanding the world. But strong feelings make it more difficult to see the reality behind the rhetoric. In The Art of Logic, Eugenia Cheng shows how mathematical logic can help us see things more clearly - and know when politicians and companies are trying to mislead us. First Cheng explains how to use black-and-white logic to illuminate the world around us, giving us new insight into thorny political questions like public healthcare, Black Lives Matter and Brexit. Then she explains how logic and emotions, used side-by-side, can help us not only to be more rational individuals, but also to live more thoughtfully. Clear-sighted, revelatory and filled with useful real-life examples of logic and illogic at work, The Art of Logic is an essential guide to decoding modern life.