I been giving this some thoughts and it have to be said not to confuse newcomers.
Since the dawn to Socionics the theory have been build upon the idea of duals. Jin and Jang right. We have logic and ethic, sensing and intuition. Why not make a pair of the opposite side, its a great way to stabilise the society. So lets break it down, why is not the traditional conflictor the dual and verse verse?
In the traditional Socionics there was probably a distinction which is not made today. If you were Ni first you are Se last. But today we have additional dominated theory which is spin. It says that duals are actually more alike than what we used to think and that duals share spins. IEI and SLE use very different functions but they share the values of which connect them. Conflict however breaks them all and thus is the new dual.
The next step would be to not praise dual the way we do but recognize that Socionics is build upon this laws of making clear distinctions and that maybe having blindspots is the way to go.