First of all, intjs are among the most difficult to manipulate among the 16 types, if not the most difficult of them all. Among the ni doms, who already have an innate tendency to see through deceit, intjs use te instead of fe, which relieves them from the need to appeal to others, as in the case of infjs. No emotional manipulation, as commonly used by other fe types will work on the intj, as they simply do not care to appear amiable. The only way to manipulate an intj is to speak their own language. Hwich is through ni, te, or fi. Especially fi, because underneath their stone cold fortresses they are actually soft on the inside. It is their weak spot. Right when you've earned their trust (which will be hard to do, but necessary for this manipulation to work) they will be surprisingly receptive to your opinions and views. Expect them to challenge you nonetheless ("really? this shirt looks bad on me? but this is similar to the shirt I wore last week and you said it was good!") but if you hold your ground they will believe you. Going back, what if you have not earned their trust? Oh, that's too bad - you might want to try your luck another type, not the intj.
