I agree with labcoat, though. I have no objection to the conclusions of this thread, it's just that there seem to be some underlying implications from them, such as that working on the HA or any function that one is weak in is senseless. This is far from true. Although you'll never be able to use such functions naturally, you will, at least over time and by practicing using them(in as sensible way), understand a limited range of situations in which the functions are required. You'll be able to parrot the functions use in such situations because, even though you don't understand how the conclusion to act or think as such is reached, you know that acting as such or concluding as such, in that very limited range of situations, is right. For instance, as an INTj myself, I've needed to learn when, where, and how to take care of my health and the aesthetics of my surroundings, and even though I am not proficient in doing so(that I let such things go), I am better in taking care of such matters than I previously was. I know I'll never be able to act as naturally with Si as an ISXp or ESXj, but I will be able to at least be functional with Si.