Anything which is not stable (unlikely to move) is unstable.
Assuming that you're referring to the poem of the city of the yes and the city of the no,
The poem uses an antithesis of Yes and No to represent openness and complete solitude
hope this helps
Nobody actually says that, but Higgins says to his mother, '' Oh, I can't be <span>bothered with young women. My idea of a lovable woman is somebody as like you as possible."</span>