Again, in matter of practice, error attaches either to the general rule, in the process of deliberation, or to the particular fact: for instance, this would be a general rule, “All water of a certain gravity is bad;” the particular fact, “this water is of that gravity.”
And that Practical Wisdom is not Knowledge is plain, for it has to do with the ultimate issue,[[33]] as has been said, because every object of action is of this nature.
To Intuition it is opposed, for this takes in those principles which cannot be proved by reasoning, while Practical Wisdom is concerned with the ultimate particular fact which cannot be realised by Knowledge but by Sense; I do not mean one of the five senses, but the same by which we take in the mathematical fact, that no rectilineal figure can be contained by less than three lines, i.e. that a triangle is the ultimate figure, because here also is a stopping point.
This however is Sense rather than Practical Wisdom, which is of another kind.[[34]]
Chapter IX.
Now the acts of enquiring and deliberating differ, though deliberating is a kind of enquiring. We ought to ascertain about Good Counsel likewise what it is, whether a kind of Knowledge, or Opinion, or Happy Conjecture, or some other kind of faculty. Knowledge it obviously is not, because men do not enquire about what they know, and Good Counsel is a kind of deliberation, and the man who is deliberating is enquiring and calculating.
Neither is it Happy Conjecture; because this is independent of reasoning, and a rapid operation; but men deliberate a long time, and it is a common saying that one should execute speedily what has been resolved upon in deliberation, but deliberate slowly.
Quick perception of causes[[35]] again is a different faculty from good counsel, for it is a species of Happy Conjecture. Nor is Good Counsel Opinion of any kind.
Well then, since he who deliberates ill goes wrong, and he who deliberates well does so rightly, it is clear that Good Counsel is rightness of some kind, but not of Knowledge nor of Opinion: for Knowledge cannot be called right because it cannot be wrong, and Rightness of Opinion is Truth: and again, all which is the object of opinion is definitely marked out.[[36]]
Still, however, Good Counsel is not independent of Reason, Does it remain then that it is a rightness of Intellectual Operation simply, because this does not amount to an assertion; and the objection to Opinion was that it is not a process of enquiry but already a definite assertion; whereas whosoever deliberates, whether well or ill, is engaged in enquiry and calculation.