I think of gaslighting as the way a perpetrator tries to convince a victim that they are innocent and it is the victim that has done something wrong. It is often used in abusive relationships. For instance, Person A confronts Person B about their slow or lack of responsiveness to text messages. Person B, however, responds by gaslighting Person A, saying it is actually Person A who is not slow in response or not responsive enough. If Person A is vulnerable, they may believe this gaslighting and start blaming themselves.