When you need to develop an argument you should know your opponent's position on the subject you are going to discuss.
Knowing the position of your opponent you can set up your argument in a competitive and coherent way. This will lend credibility to your argument and will make it clear to readers what you are trying to refute.
Express Inner thoughts. It would be 'Show flashbacks' if it had more detail after "again", but it's Express Inner thoughts because someone is saying their thoughts aloud.