四明十義書 1.32

1.32

如不識瓜瓠者，乃錯認瓜定言是瓠。及被識者斥之，其錯言者乃云相狀同瓠。既以似為真，故不可以此人之言定其物像也。

It is like someone who does not recognize melons and gourds: mistaking a melon, he insists it is a gourd. When rebuked by someone who knows, the mistaken person then says its appearance is the same as a gourd. Since he takes the resemblance for the real thing, one cannot determine the nature of the object from this person's words.