predication:谓语。语法上来说，一个句子是有一个主语和一个谓语组成的。主语：that about which sth is said is the subject. 谓语：what is said is the predicate.
"predication" is the idea-connecting process by which we attribute sth to sth else. if predication is the process of bringing ideas together and coupling them, then the test of sound predication is that the ideas that are brought together belong together. ideas belong tegether if their grammatical connection reflects a real connection in the objective order of things.
也就是谓语要如实的反应主语。比如：荨麻疹是一种传染疾病。这就是一个合理的论断。
