Karl popper insisted on the importance of falsifiability over positive confirmation , because no matter how many white swans we spot , a single black one is enough to overthrow the ' law ' that all swans are white .

波普尔（karlpopper）坚持认为可证伪性比正面证实更重要，因为不管我们看到过多少只白天鹅，哪怕只有一只黑天鹅就能推翻“天鹅皆白”这一“定律”。