I agree with you, Susie, that the term 'gaslighting' is being overused and misused. It should only be ever used in relation to abusive relationships. Gaslighting, like bullying, is not a one-off occurrence - it persists and is a regularly recurring feature of a relationship where there is a power differential i.e. the gaslighter is attempting to exert control over their 'victim'. When challenged, a bona fide gaslighter will resort to a whole range of other controlling behaviours least of all being 'I don't remember saying that' or 'I didn't say that'.