That guy ' s video sucks . It ' s by a supposed INTJ who romances his own type and has a piss poor understanding of INTPs . This oneviAbIYV 6 Gw has one of each , just talking about stuff , and it shows the differences even visually quite well . Here ' s a cognitive functions test . If you google cognitive functions test you could surely find more . One good distinction is that INTPs learn just for fun , to learn , while INTJs see it and most aspects of life as a tool , a means to an end of application . INTPs are not practicalminded . We ' re not planners . We ' re more . processors . Information in , goes through logical algorithms , tangents and tentative conclusions come out . We analyze in that we break down information , whereas Ni doms synthesize it into a slowerreached but firmer , everhonedinupon conclusion . INTPs lack particular vision and goals .