Answer:
1.I usually ask "what if" to myself everytime I'm making a decision,It helps me think of consequences "What if I got this right?Will I pass the exam."
2.Its good if your being cautious in your actions and certain results,But it is not good to overthink about this questions it can cause damage to the mental health or even relationships.
3.We argue with someone when we want to defend our side of the story,to send a message to someone in a violent way.This can be the cause of anger or strong and negative emotions.
4.We use conditionals in an argument to make them see what you are thinking and what can happen,Logically.