《公孙龙子·坚白论》
见到的白是石的白，触知的坚是石的坚。见到的与见不到的相结合，就是二加一而成为三，坚白石如同物体的长度与宽度相结合在一起而不可分离那样，难道这样说是逻辑错误吗？
曰：石之白，石之坚，见与不见，二与三，若广修而相盈也。
The white that is seen is the white of the stone, and the firmness that is touched is the firmness of the stone. The combination of what is seen and what is not seen is two plus one to make three. Just as the length and width of an object are combined and cannot be separated, is it a logical error to say so?