AbstractDeceitful behaviors are mostly verbal, largely culture-bound, and relatively political. Verbal deceitfulness gives us such a survival advantage that some evolutionary biologists believe that the capacity to speak and the ability to lie have been developed hand in hand. This study was an attempt to investigate the relative impacts of using verbal (VSL) and semiotic (SLS) liespotting strategies on Persian Speaking EFL learners’ interpretation of political discourse. A research sample of male and female EFL learners was selected and assigned into two groups (n1=30, n2=22). Participants were all recognized as intermediate EFL learners after running an English general proficiency test (PET). Later, in two parallel experiments, the participants were exposed to VLS and SLS in 16 classroom sessions before they performed on a post-intervention political discourse comprehension. Both experimental groups showed a lapse in their posttests. Descriptive and inferential statistics supported meaning.....