A word can be true or false. Right or wrong. Truthful or misleading. Realistic or delusional. Delusional has nothing to do with lying. Fabulation is not knowingly deceptive. The pathological liar is not always in bad faith... Falsity and insincerity are not mutually exclusive. They sometimes intrigue each other without ever completely overlapping. It is by risking a few steps in the fields of psychoanalysis and philosophy that the author ventures to sketch in a few words the contours of lies, delirium, fabulation, bad faith, manipulation...