这应该很明显就是不认为是定义,否则怎么会用statement这个term呢?当然这是数学上对defition的definition了。
一般用语里定义这个term哪有这么严格?连最高法院大法官都说过这样的话来说明什么是hard-core pornography:
I shall not today attempt further to define the kinds of material I understand to be embraced within that shorthand description ["hard-core pornography"], and perhaps I could never succeed in intelligibly doing so. But I know it when I see it, and the motion picture involved in this case is not that.
好玩吧?