List four effective and four ineffective examples of persuasive techniques from Twelve Angry Men.

Effective persuasive techniques:
1 - Juror eight explains his reasons for voting "not guilty" at the beginning of the play.  He effectively persuaded juror nine to vote "not guilty" by explaining that he had some doubts that needed to be discussed.
2 - Juror eight explains his doubt about the testimony of the old man about being able to hear the boy yell "I'm going to kill you" while the el train was going past the window.  He does this by discussing the amount of time it takes for an el train to pass the window and how loud it is.
3 - Juror eight explains his doubt about the old man's testimony about going to his front door and seeing the boy running down the stairs.  He does this by acting out how long it would actually take for the old man to get to his front door (referencing his use of canes and the diagram of the apartment).
4 - Juror eight establishes that it is possible that the boy told the truth about the switch knife, by purchasing and bringing in an exact replica of the knife in question.

Ineffective persuasive techniques:
1 - Juror three tries to persuade the other jurors to stay with him by talking about his own son.
2 - Juror ten tries to persuade the other jurors to vote guilty because of his racist views.
3 - Juror seven tries to persuade the other jurors to vote guilty because he has better places to be.
4 - Juror three tries to persuade the other jurors to vote guilty by threatening to hang the jury.