科學是事實積的，一如房子是石頭蓋的；但堆積的事實並不成科學，一如堆積的石頭並不是房子。
—亨利．龐加萊（法國數學家、理論物理學家及科學哲學家）
“Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house.”
—Henri Poincaré, French mathematician, theoretical physicist and philosopher of science
