As with explanatorily primitive identities, they appear to be primitive facts postulated in an ad hoc way, largely in order to save a theory, with no support from cases elsewhere.

• 正如解释上的基础同一，它们表现出来是基础的事实，设定是完全特定的，更多就是为了挽救理论，没有从别处获得什么支持。