Understanding, creating original works, inventing, etc. Most of this is never realized due to laziness, lack of motivation, lack of opportunity, constant roadblocks and BS from others, etc. INTPs are one of the only types that (strive to) do things properly. That is, they try to think of the ideal version of something, or the best way to do something, or a better way to do things, or a way to make things better, then they try to make that happen, rather than just doing the same old thing. INTJs and ENTPs can be similar, but their preference for getting things done over creating something clean, elegant, cohesive, etc, weakens them in that area.