白板（拉丁语：Tabula rasa）是一个认知论主题。其认为人的个体生来没有内在或与生俱来的心智，也即是一块白板，所有的知识都是逐渐从他们的感官和经验而来。

Tabula rasa (/ˈtæbjələ ˈrɑːsə, -zə, ˈreɪ-/) refers to the epistemological idea that individuals are born without built-in mental content and that therefore all knowledge comes from experience or ****. Proponents of tabula rasa generally disagree with the doctrine of Innatism which holds that the mind is born already in possession of certain knowledge. Generally, proponents of the tabula rasa theory also favor the "nurture" side of the nature versus nurture debate when it comes to aspects of one's personality, social and emotional behavior, knowledge and sapience.