Distinctio is an explicit reference to a particular meaning or to the various meanings of a word, in order to remove or prevent ambiguity.
- To make methanol for twenty-five cents a gallon is impossible; by "impossible" I mean currently beyond our technological capabilities.
- The precipitate should be moved from the filter paper to the crucible quickly--that is, within three minutes.
- Mr. Haskins describes the process as a simple one. If by simple he means easy to explain on paper, he is correct. But if he means there are no complexities involved in getting it to work, he is quite mistaken.
- The modern automobile (and here I refer to the post-1975, desmogged American car) is more a product of bolt-on solutions than of revolutionary engineering.
Many of our words, like those of evaluation (better, failure high quality, efficient, unacceptable) and those referring to abstract concepts which are often debated (democracy, justice, equality, oppression) have different meanings to different people, and sometimes to the same person at different times. For example, the governments of both Communist China and the United States are described as "democracies," while it could be argued rather convincingly that neither really is, depending on the definition of democracy used. Semanticist S. I. Hayakawa even goes so far as to claim that "no word ever has exactly the same meaning twice," and while that for practical purposes seems to be a substantial exaggeration, we should keep in mind the great flexibility of meaning in a lot of our words. Whenever there might be some doubt about your meaning, it would be wise to clarify your statement or terms. And distinctio is one good way to do that.
Some helpful phrases for distinctio include these: blank here must be taken to mean, in this context [or case] blank means, by blank I mean, that is, which is to say. You can sometimes use a parenthetical explanation or a colon, too: Is this dangerous (will I be physically harmed by it)?
