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Thank you for your examples everyone. Pixi, I thought "To be honest" preceded a lie, but as you say you don't use the phrase in that way. Maybe it's because people feel awkward about what they need to say next, and maybe I mistake their awkwardness for lying. I've also noticed that when people tell me a bit information about themselves, out of the blue, for example someone might say "I'm a very reasonable person" (when I haven't even asked them), I've noticed that person turns out to be a completely unreasonable, flying off the handle kind of loony. This has happened enough times to me, so now I'm suspicious if someone tells me something about themselves out of the blue. Anyone else noticed this?