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Related to Vagueness: Vagueness doctrine

VAGUENESS. Uncertainty.
     2. Certainty is required in contracts, wills, pleadings, judgments, and indeed in all the acts on which courts have to give a judgment, and if they be vague, so as not to be understood, they are in general invalid. 5 B. & C. 583; 1 Russ. & M. 116 1 Ch. Pract. 123. A charge of "frequent intemperance" and "habitual indolence" are vague and too general. 2 Mart. Lo. Rep. N. S. 530. See Certainty; Nonsense; Uncertainty.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
But there was an unpractical vagueness in their movements throughout the day; neither one of them seemed to consider any question of effectual escape, disguise, or long concealment.
It warmed the blood and cleared the head; it filled the soul with well-being; it disposed the mind at once to utter wit and to appreciate the wit of others; it had the vagueness of music and the precision of mathematics.
I did not conceive of literature as the expression of life, and I could not imagine that it ought to be desultory, mutable, and unfixed, even if at the risk of some vagueness.
And one last picture I have, standing out very clear and bright in the midst of vagueness before and blackness afterward.
'I'll get you the name of the branch he's been promoted to, for I think I heard they'd moved him up one already.' And the next day he brought me the name of the township of Yea, some fifty miles north of Melbourne; but, with the vagueness which characterized all his information, he was unable to say whether I should find my relative there or not.
Tempted I already was, but as yet the temptation was vague, and its very vagueness made me tremble.
To the peasants of old times, the world outside their own direct experience was a region of vagueness and mystery: to their untravelled thought a state of wandering was a conception as dim as the winter life of the swallows that came back with the spring; and even a settler, if he came from distant parts, hardly ever ceased to be viewed with a remnant of distrust, which would have prevented any surprise if a long course of inoffensive conduct on his part had ended in the commission of a crime; especially if he had any reputation for knowledge, or showed any skill in handicraft.
The vagueness of the project, and the convulsive effort with which he plunges into the execution of it, are equally characteristic of a feeble-minded man.
"Except I refuse to renegotiate the MDT to make it more specific as DND wants because I believe with sound authority based on long learning of deterrence theory that in vagueness lies its greatest strength.
Under-secretary for tourism Savvas Perdios, extolling the initiative said the Cyprus breakfast had something different to offer from the English and American breakfast served in many hotels, but he opted for vagueness when describing it.
'In vagueness lies the best deterrence.' This was how Foreign Secretary Teodoro Locsin Jr.
In spite of this one important obligation however, President Rodrigo Duterte and his Defense Secretary Delfin Lorenzana are one in their doubts that owing to what they termed as 'vagueness' in the way the treaty provisions were crafted, compliance by the US with its obligation relative to the defense of the Philippines may not come when it is critically needed.