Gaslighting, where someone causes another person to doubt their sanity or senses, can cause psychological damage. There's an opposite thing, though, that can also be damaging. As far as I know, it has no name. I call it "lightgassing" (or "light gassing"). Here, I explain how lightgassing works. Lightgassing is when one person agrees with or validates another person's false beliefs or misconceptions in order to be supportive.  Unlike gaslighting, a tactic of jerks and abusers,...