The purpose of this thread is to define the exertion/slave types postulated by dual-type theory. To do this, it will be necessary to first define the exertion elements which comprise them; that is another aim of this thread. All interested parties are invited to participate. (note: if you are skeptical of the existence of dual-type theory, please DO NOT post in this thread.)
Exertion type is that which you "do": it is your skill at replicating ideas and activities observed by means of the IM elements. Exertion aspects are means of channelling energy, and are always activities designed to differentiate energies from each other. These notions are poorly understood: we here lots of talk about efficiency, but little explanation as to -why- one process is more efficient than another. Exertion theory is the first step on the road to understanding the nature of energy, something humans are naturally estranged from. (I've heard physicists describe light as "something we may not be able to comprehend"; to hear a physicist talk of light that way is a clear sign our knowledge of energy is lacking.)
Exertion is also a theory of talent; a natural measure of a person's capacity to hold their hand steady as they write; to coordinate themselves; to placiate others relationally and to phrase their speech effectively; to demonstrate emotional cues and to create dramatic effect; to comfort others and to react harmoniously with the world around oneself; to claim territory quickly and effectively; to minimize entropy; to assemble structures which possess internal and structural integrity; to release potential energy and to reproduce ideas; and to stir other's emotions with precision and grace. No person has ever demonstrated their talent at all of these equally; rather, effectiveness in one area of the above can be demonstrated by analysis to always be accompanied by ineffectiveness in another. The great thinkers and theorists find themselves perpetually misunderstood; the great athletes prefer work at department stores to the university.
When one speaks of exertion, one speaks of action. It is something done, something happening, something related more to physics than to psychology. (thanks, crazedrat) Yet at root, what are the IM elements but this very energy, apprehended from within rather than without? The following is how I see the exertion elements from what I have observed, and that which I have deduced by contrast between exertion and information metabolism.
(for purposes of brevity I will abbreviate exertion as "Ex-" when used with an element)
Extroverted thinking, as an aspect of energy, is the act of a bond. It includes the chemical and ionic bonds of chemistry, and like metabolism Te, is dependent on Fi polarities between aspects. Ex-Te language is precise, so that it can connect precisely where it is most suited and nowhere else. Similarly, individuals with strong exertion Te are wordsmiths who easily phrase. This is important because the strong Te comes at the price of Fe, which is one's means of self-expression: it is important for the Te person to express themselves as clearly as possible because others will not take for granted what they mean; how could they, when they are offered no contextual cues to clue people in as to past experiences with the content? Ex-Te people prefer the explicit over the implicit: they will use large words to state what they mean, but only as required. They avoid flowery language, and are apt to argue over questions of definition for long hours. An Ex-Te person is like to break a word down to its roots when analyzing it, carefully scrutenizing it syllable by syllable to understand every last facet of its meaning. For this reason they are effective technical writers.
To the strong Ex-Te person everything is headed toward something: the world is a set of paths that one must travel to find one's specific Ex-Fi at the end. Likewise the Ex-Te person is a niche individual who will choose something and stick to it: they are devoted partners in a relationship and will do what is necessary to make them last. This may prove a weakness of theirs, especially if their partner is not to be trusted; Ex-Te people can easily be taken advantage of and forced into unequal relational settings.