Vagueness
WordNet
noun
(1) Indistinctness of shape or character
"The scene had the swirling vagueness of a painting by Turner"
(2) Unclearness by virtue of being poorly expressed or not coherent in meaning
"The Conservative manifesto is a model of vagueness"
"These terms were used with a vagueness that suggested little or no thought about what each might convey"