Question about quote "But my uncle-father and aunt-mother you are deceived" (Act 2 scene 2) who is speaking to whom and about what? What is the significance of the passage as it relates to the theme (Theme: Humans as Deeply Flawed )

Hamlet. You are welcome. But my uncle-father and aunt-mother are deceived

Guildenstern. In what, my dear lord?

Hamlet. I am but mad north-north-west. When the wind is

southerly, I know a hawk from a handsaw.

Hamlet is talking to Guildernstern. Hamlet implies that his mother and uncle know nothing about his "mental instability". An extension of this is that the king and queen are using his two friends, Rosencrantz and Guildenstern, for their own ends. I think the theme of madness and what is truth is at play here.