For instance, if you purport retrocognitive knowledge that "Winston Churchill killed a parrot", the only way of verifying that knowledge would be to consult extant sources of Churchill's activities.
例如，如果试图倒摄认知"温斯顿·邱吉尔杀死了一只鹦鹉"的知识，那么验证的唯一方法就是查询丘吉尔活动的现存资料。