What part of the play can the last line be linked to and what meaning can it represent? the line is as follows: "That function is smothered in surmise,

Shakespeare
loved .  He loved to pit ideas against each other and see what happens. is full of antithesis. 
In the very opening scene we are told that "foul is fair and fair is foul".  In other
words, things aren't what they appear to be.

Throughout the play, we are
confronted with what something appears to be and reality. appears to be a hero but proves to be
a villain. appears to be inept in battle but proves to be a...