co-worker: why have you changed your opinion since last week?
dilbert: i haven't changed my opinion.
co-worker: no, it was different last week.
dilbert: are we really debating which one of us is a better authority on my opinion?
co-worker: you might be lying about not changing your opinion.
dilbert: and you might be hallucinating or lying or just stupid.
co-worker: you might be trying to gaslight me right now. i'm glad we can have these honest talks.
dilbert: i hope you plunge to your death in a freak elevator accident.