I recently wrote a short note about how the brain worked, sort of.
A response was that it omitted models, which it did.
I wondered then how many other ‘mental faculties’ there are.
These are not entirely orthogonal, but I try for orthogonality.
<ul><li>Collections of propositions; belief systems,
<li>Bindings of individual constants and predicates to patterns recognized by our senses, including our self-awareness,
<li>Fears
<li>Goals
<li><a href=model.html>Models</a>
<li>Techniques or reflexes; patterns of actions that accomplish changes in the outside world.
Actions may be contingent on external input.
Example: riding a bicycle.
<li>Whole mutually consistent systems of propositions, with no requirement for agreement with other such systems in the same brain.
This is the essence of <a href=Hypothetical.html>these modes of thought</a>.
<li>Emotions
<li>Plans
<li>Stories (generally understood to be fiction)
</ul>
I have probably omitted half of the important faculties.
Relations between these things may indeed be more significant than the things themselves.
<p>Somewhere I heard some category of faculties divided by this dichotomy:<ul>
<li>proposer, that generates vaguely plausible ideas,
<li>disposer, that rejects most of them.</ul>
This dichotomy was used to explain many familiar temporary aberrations of thinking in terms of temporary failures in one of these two.
Bipolar disorder was amusingly explained as alternate domination of one of these two over the other. 
<hr>Somewhere: the subjunctives:
Could I, Would I, Should I?