Full Idea
A common intuition is that a vague object has indeterminate or fuzzy spatio-temporal boundaries, such as a cloud. Mount Everest can only have arbitrary boundaries placed around it, so in nature it must have fuzzy boundaries.
Gist of Idea
Objects such as a cloud or Mount Everest seem to have fuzzy boundaries in nature
Source
R Keefe / P Smith (Intro: Theories of Vagueness [1997], §5)
Book Reference
'Vagueness: a Reader', ed/tr. Keefe,R /Smith,P [MIT 1999], p.51
A Reaction
We would have to respond by questioning whether Everest counts precisely as an 'object'. At the microscopic or subatomic level it seems that virtually everything has fuzzy boundaries. Maybe boundaries don't really exist.