Macbeth 1.7 Metaphor: "fume"

The transcript discusses Lady Macbeth's comparison of the brains of drunk servants to a distilling apparatus, highlighting the analogy of fuzzy memories to vapors inside a still. It further explains how the brain's reasoning process is similar to a condenser, working with formless liquid memories.

In what way does Lady Macbeth describe the memories collected by the brain?

What metaphor does Lady Macbeth use to describe the state of memories in a drunk person?