Hamlet help with homework: Act 1, Scene 5, Lines 13 to 38, Hamlet puts forth a theory about human behavior

In Act 1, Scene 5, Lines 13 to 38, Hamlet puts forth a theory about human behavior. Some individuals, Hamlet says, might be “as pure as grace” but may have “one defect” that corrupts their characters. It sounds like Hamlet is referring to a “tragic flaw.” Does this idea apply to Hamlet? If so, what is the tragic flaw in Hamlet’s character? Does the idea apply to other characters in the play?