CHAPTER VIII.

JUDGMENTS

The first step in the process of reasoning is that of Conception or the

forming of Concepts. The second step is that of Judgment, or the process

of perceiving the agreement or disagreement of two conceptions.

_Judgment_ in Logic is defined as: "The comparing together in the mind

of two notions, concepts or ideas, which are the objects of

apprehension, whether complex or incomplex, and pronouncing that they

agree or disagree with each other, or that one of them belongs or does

not belong to the other. Judgment is therefore affirmative or negative."

When we have in our mind two concepts, we are likely to compare them one

with the other, and to thus arrive at a conclusion regarding their

agreement or disagreement. This process of comparison and decision is

what, in Logic, is called _Judgment_.

In every act of Judgment there must be at least two concepts to be

examined and compared. This comparison must lead to a Judgment

regarding their agreement or disagreement. For instance, we have the two

concepts, _horse_ and _animal_. We examine and compare the two concepts,

and find that there is an agreement between them. We find that the

concept _horse_ is included in the higher concept of _animal_ and

therefore, we assert that: "_The horse is an animal._" This is a

statement of _agreement_ and is, therefore, a _Positive Judgment_. We

then compare the concepts _horse_ and _cow_ and find a disagreement

between them, which we express in the statement of the Judgment that:

"_The horse is not a cow._" This Judgment, stating a disagreement is

what is called a _Negative Judgment_.

In the above illustration of the comparison between the concepts _horse_

and _animal_ we find that the second concept _animal_ is broader than

the first, _horse_, so broad in fact that it includes the latter. The

terms are not equal, for we cannot say, in truth, that "an animal is the

horse." We may, however, include a _part_ of the broader conception with

the narrower and say: "some animals are horses." Sometimes both

concepts are of equal rank, as when we state that: "Man is a rational

animal."

In the process of Judgment there is always the necessity of the choice

between the Positive and the Negative. When we compare the concepts

_horse_ and _animal_, we must of necessity decide either that the horse

_is_ an animal, or else that it is _not_ an animal.

The importance of the process of Judgment is ably stated by Halleck, as

follows: "Were isolated concepts possible, they would be of very little

use. Isolated facts are of no more service than unspun wool. We might

have a concept of a certain class of three-leaved ivy, as we might also

of poisons. Unless judgment linked these two concepts and decided that

this species of ivy is poisonous, we might take hold of it and be

poisoned. We might have a concept of bread and also one of meat, fruit

and vegetables. If we also had a concept of food, unrelated to these, we

should starve to death, for we should not think of them as foods. A

vessel, supposing itself to be far out at sea, signaled another vessel

that the crew were dying of thirst. That crew certainly had a concept of

drinkable things and also of water. To the surprise of the first, the

second vessel signaled back, 'Draw from the sea and drink. You are at

the mouth of the Amazon.' The thirsty crew had not joined the concept

_drinkable_ to the concept of water over the ship's side. A man having

taken an overdose of laudanum, his wife lost much valuable time in

sending out for antidotes, because certain of her concepts had not been

connected by judgment. She had good concepts of coffee and of mustard;

she also knew that an antidote to opium was needed; but she had never

linked these concepts and judged that coffee and mustard were antidotes

to opium. The moment she formed that judgment she was a wiser woman for

her knowledge was related and usable.... Judgment is the power

revolutionizing the world. The revolution is slow because nature's

forces are so complex, so hard to be reduced to their simplest forms and

so disguised and neutralized by the presence of other forces....

Fortunately judgment is ever silently working and comparing things that,

to past ages, have seemed dissimilar; and it is continually abstracting

and leaving out of the field of view those qualities which have simply

served to obscure the point at issue."

Judgment may be both analytic or synthetic in its processes; and it may

be neither. When we compare a narrow concept with a broader one, as a

part with a whole, the process is synthetic or an act of combination.

When we compare a part of a concept with another concept, the process is

analytic. When we compare concepts equal in rank or extent, the process

is neither synthetic nor analytic. Thus in the statement that: "A horse

is an animal," the judgment is synthetic; in the statement that: "some

animals are horses," the judgement is analytic; in the statement that:

"a man is a rational animal," the judgment is neither analytic nor

synthetic.

Brooks says: "In one sense all judgments are synthetic. A judgment

consists of the union of two ideas and this uniting is a process of

synthesis. This, however, is a superficial view of the process. Such a

synthesis is a mere mechanical synthesis; below this is a

thought-process which is sometimes analytic, sometimes synthetic and

sometimes neither analytic nor synthetic."

The same authority states: "The act of mind described is what is known

as _logical judgment_. Strictly speaking, however, every intelligent act

of the mind is accompanied with a _judgment_. To know is to discriminate

and, therefore, to judge. Every sensation or cognition involves a

knowledge and so a judgment that it exists. The mind cannot think at all

without judging; to think is to judge. _Even in forming the notions

which judgment compares, the mind judges._ Every notion or concept

implies a previous act of judgment to form it: in forming a concept, we

compare the common attributes before we unite them; and comparison is

judgment. It is thus true that 'Every concept is a contracted judgment;

every judgment an expanded concept.' This kind of judgment, by which we

affirm the existence of states of consciousness, discriminate qualities,

distinguish percepts and form concepts, is called _primitive or

psychological judgment_."

In Logical Judgment there are two aspects; _i.e._, Judgment by Extension

and Judgment by Intension. When we compare the two concepts _horse_ and

_animal_ we find that the concept _horse_ is contained in the concept

_animal_ and the judgment that "_a horse is an animal_" may be

considered as a Judgment by Extension. In the same comparison we see

that the concept _horse_ contains the _quality of animality_, and in

attributing this quality to the _horse_, we may also say "_the horse is

an animal_," which judgment may be considered as a Judgment by

Intension. Brooks says: "Both views of Judgment are correct; the mind

may reach its judgment either by extension or by intension. The method

by extension is usually the more natural."

When a Judgment is expressed in words it is called a Proposition. There

is some confusion regarding the two terms, some holding that a Judgment

and a proposition are identical, and that the term "proposition" may be

properly used to indicate the judgment itself. But the authorities who

seek for clearness of expression and thought now generally hold that:

"_A Proposition is a Judgment expressed in words._" In the next chapter,

in which we consider Propositions, we shall enter into a more extended

consideration of the subject of Judgments as expressed in Propositions,

which consideration we omit at this point in order to avoid repetition.

Just as the respective subjects of Concepts and Terms necessarily blend

into each other, so do the respective subjects of Judgments and

Propositions. In each case, too, there is the element of the mental

process on the one hand and the verbal expression of it on the other

hand. It will be well to keep this fact in mind.

The Art of Logical Thinking; Or, The Laws of Reasoning · 第 8 / 19 章