- that process in which a person engages by which he hopes he will someday come to know. (2ACC lB, 5311CM17)
- the combination of past observations to derive a future observation. (PAB 8)
- a substitution for an ability to predict. (2ACC 21A, 5312CM11)
- condensed effort. (2ACC 21A, 5312CM11)
- comparing a particular datum with the physical universe as it is known and observed. (Lecture: Education and the Auditor, 1951, p. 9)