出典:Wiktionary
Coined by Austrian philosopher Friedrich Waismann in 1945.
The philosophical concept of open texture differs slightly from that of vagueness. For instance, the term "mother" is not vague, but can be made to seem imprecise (read "open-textured") if one draws a distinction between the mother who produces the ovum, the one who carries the fetus, and the one who delivers the baby. [1]