Gaslighting

What it means

Gaslighting is a form of psychological manipulation in which someone causes another person to question their own memory, perception, or sanity. The term comes from the 1944 film Gaslight, in which a husband systematically dims the gas lights in the house and then denies that anything has changed when his wife notices - making her believe she’s losing her mind.

The core mechanism is simple but devastating: deny the target’s reality, consistently and confidently, until they begin to doubt it themselves. “That never happened.” “You’re imagining things.” “You’re being too sensitive.” “I never said that.” Each individual denial might seem minor. Cumulatively, they erode the target’s trust in their own judgement - which is exactly the point, because a person who doesn’t trust their own perception becomes dependent on someone else’s.

Gaslighting is distinct from ordinary disagreement or even ordinary dishonesty. A liar knows they’re lying and wants to avoid being caught. A gaslighter wants the target to stop trusting their ability to catch anything at all. The goal isn’t just to win an argument - it’s to dismantle the other person’s confidence in their own mind.

In the real world

In intimate relationships, gaslighting follows a recognisable pattern. One partner raises a concern - “You said something hurtful last night.” The other responds with flat denial (“I never said that”), reframing (“You’re twisting my words”), or counter-attack (“You’re always looking for reasons to start a fight”). Over time, the person raising concerns stops raising them - not because the behaviour has changed, but because they no longer trust their own recollection of events.

In workplaces, gaslighting can be subtler. A manager assigns a task verbally, then denies ever giving the instruction when it’s completed differently than they now want. Meeting decisions are “remembered” differently by the person in power. Feedback is contradictory - praised one week, criticised for the same behaviour the next - creating a permanent sense of instability. The target starts keeping obsessive notes, not because they’re paranoid but because they’ve learned they can’t rely on shared reality.

In politics, gaslighting operates at scale. Officials deny making statements that are on video. Events witnessed by millions are described as not having happened, or as having happened very differently. The goal isn’t to convince everyone - it’s to create enough doubt and confusion that people disengage from the question of what’s true altogether.