“The task of making more exact a vague or not quite exact concept used in everyday life or in an earlier stage of scientific or logical development, or rather of replacing it by a newly constructed, more exact concept, belongs among the most important tasks of logical analysis and logical construction. We call this the task of explicating, or of giving an explication for the earlier concept; this earlier concept, or sometimes the term used for it, is called the explicandum; and the new concept, or its term, is called an explicatum of the old one.”

Foreword
Logical Syntax of Language, 1934/1937

Source: 1940s-1950s, Administrative Behavior, 1947, p. 43.

On the Social State of Marxism (1978)

As quoted in Dictionary of Scientific Biography (1970 - 1990) edited by M Steck.

The Way of God's Will Chapter 2-1 God's Words http://www.unification.org/ucbooks/WofGW/wogw2-01.htm Translated 1980.

Sixth Lecture, Statistical Problems in Physics, p. 220
Probability, Statistics And Truth - Second Revised English Edition - (1957)

The Relation of the State to the Invididual (1890)
Context: Anarchism, in dealing with this subject, has found it necessary, first of all, to define its terms. Popular conceptions of the terminology of politics are incompatible with the rigorous exactness required in scientific investigation. To be sure, a departure from the popular use of language is accompanied by the risk of misconception by the multitude, who persistently ignore the new definitions; but, on the other hand, conformity thereto is attended by the still more deplorable alternative of confusion in the eyes of the competent, who would be justified in attributing inexactness of thought where there is inexactness of expression. Take the term "State," for instance, with which we are especially concerned today. It is a word that is on every lip. But how many of those who use it have any idea of what they mean by it? And, of the few who have, how various are their conceptions! We designate by the term "State" institutions that embody absolutism in its extreme form and institutions that temper it with more or less liberality. We apply the word alike to institutions that do nothing but aggress and to institutions that, besides aggressing, to some extent protect and defend. But which is the State's essential function, aggression or defence, few seem to know or care. Some champions of the State evidently consider aggression its principle, although they disguise it alike from themselves and from the people under the term "administration," which they wish to extend in every possible direction. Others, on the contrary, consider defence its principle, and wish to limit it accordingly to the performance of police duties. Still others seem to think that it exists for both aggression and defence, combined in varying proportions according to the momentary interests, or maybe only whims, of those happening to control it.

Source: Derek Parfit, ‘Reasons and Motivation’, Proceedings of the Aristotelian Society, supp. vol. 71 (1997), p. 121

Strawson (1950) On Referring p. 27.