Because the concepts behind the terms "origin science" and "operation science" are deficient in defending a Christian view of science and history from secular positivism, an alternative scheme is suggested that accommodates a traditional Christian view of truth. In contrast to origin and operation science, we suggest that: (1) origins (properly defined) is a question of metaphysics, (2) the study of the past is the domain of history, and (3) science addresses present phenomena and timeless rules of nature. Interdisciplinary investigations like natural history or historical science are best addressed as "mixed questions."