Conspiracy theories and rumors, as forms manifesting “social thought” (Rouquette, 1973), share processes and functions. The few studies dealing specifically with the question of belief in rumors questioned the link between adhesion and transmission (Allport & Lepkin 1943; Rosnow, 1991; Guerin & Miyazaki, 2006). The aim here will be to question the link between « knowledge », « adhesion » and « transmission » in conspiracy theories and rumors through two empirical studies. Can we know and transmit without adhering to? Can one know and adhere to without transmitting? Can we adhere to and transmit without actually « knowing »?
