唐朝时有个贾嘉隐,年仅7岁就很有口才,有学问的大人也耍弄不了他。一次,有两位自恃有才的老秀才听说贾嘉隐聪明,故意前来考考他。其中一位靠在一棵槐树上,问贾嘉隐:“你说说看,我靠着的这棵树是什么树?”“松树。”贾嘉隐不假思索,开口便答。“嘿!这明明是一棵槐树,你怎么说是松树呢?”贾嘉隐有条有理地说:“按年龄,我应该叫您公公,公公旁边靠着一棵树,不正是‘松’吗?”另一位秀才听贾嘉隐这么说,也往树上一倚:“我也靠着这棵松树,你也该叫我一声公公吧” There was a Jia Jiayin in the Tang Dynasty, a very eloquent age of 7, and learned adults could not get him. Once, there are two rely on the talented old scholar I heard Jiajia Yin clever, deliberately came to test him. One of them rested on a locust tree and asked Jiajia: “You tell me what tree I am leaning against.” “Pine tree.” Jia Jiayin did not hesitate to say so. “Hey! This is obviously a locust tree, how do you say it is a pine tree?” Jia Jiayin said in a sensible way: “By age, I should call you father-in-law, father by the side of a tree, Pine ’? ”Another scholar Jia Jiayin to hear that, but also to a tree lean: “ I rely on the pine tree, you should call me a father-in-law it ”