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There are some ways to inoculate yourself. Jordan Peterson gives some good advice about this (but it's about relationships in general) in his 12 rules for life. Awareness of the topic, personal experience, and being careful as you get to know someone helps on the personal level. But man wouldn't it be nice to get a one-time inoculation against all the gaslighters in the world. :) As long as it's not a chip installed in my brain, haha, I would rather some other kind of magic.