the suggestion made was that we humans are hardwired to be deceived in order to facilitate social stability. Consider, for the majority of recorded history, the vast majority believed that things like the inferiority of women, the propriety of slavery, the conquest of competitors, and so on, was perfectly 'natural and true.'
Or consider this thoroughly modern paradox: Never in the history of species, have humans generally believed themselves more independent and self-sufficient, while at the same time, never in the history of the species, have humans in fact been less self-sufficient or more interdependent.
Or even the commercials you watch. Any commercial that does not give you facts arguing the superiority of a product over it's competitors is actually trying to train you rather than convince you.