Logicians and Metaphysicists agree that every science is of Universals, because there is no science of singulars, as Duns Scotus indicated, and is deduced from reason, because the Universal has its requisite conditions for the subject and object of science: this consists of a definable entity, and this should be considered with demonstrable passions; and the Philosopher proves that the Universal is Being, and under the condition of Non-being, science cannot be understood: and he gives the reason, because the intelligible moves the understanding to understand, being a passive virtue of the same understanding, as the Philosopher pointed out, and Scotus explained, saying that by reflecting on itself, the understanding knows the reason for its opinion, due to the strength of its intellectual operation, conceiving concepts as universals, with which it proceeds to the rest in operation, as is experienced in this science, by first and second intentions, not only in understanding, but also in acting, perceiving the first concepts with distinctions by universals, because as Torrejon said: Those things, which according to their entities, are signified, are of the first intention; and those that declare the affections of things (because the understanding participates in them) are of the second intention: and this way of understanding and acting in principle, originates from Universals; from which science is given, deriving from understanding by first and second intention the acting in this science by first and second intention, the fundamental thing being the understanding of Universals, in which Porphyry, an Apostate of the Catholic Faith, Greek by Nation, is considered the inventor (in terms of method and explanation), who flourished in Sicily around the year 280. after the Birth of our Redeemer, being a public Preceptor of Philosophy, moved to such work at the request of Chrysaur, a Roman nobleman, who wished to understand the categories of the Philosopher with sufficient principles, which were the Predicables of Porphyry, commonly called voices in the Schools, reduced to five, which are, Genus, Species, Difference, Proper, and Accident.
In schools, questions are raised, whether these Universals, or Predicables are voices, or entities; or if they signify entities, and voices? Opinions concur, recognizing that the most received in Universities, is to call them voices, because Logic, and Dialectic are considered as debate, which is achieved with words, speaking: and speaking, signifies voices, and things, with which the term is suitable to one, and another sense, as it is proven by Cicero, and expressed by Saint Augustine, that the curious can see, from which the overcoming of the difficulty is derived.
With such resolution, three divisions are found in the voices, noted by the acuity of Logicians, and Metaphysicians: the first, and most generic is in simple voices, and in compound voices. A simple voice is that which does not consist of many sayings, and a compound voice is the one that is composed of many sayings.
On the contrary, a voice will be compound, which although it adheres to few expressions, signifies many singulars, or many things; e.g. Thrust, Slash, insofar as they signify a singular species of wound, thus being a single expression, and because of the specific meaning, they are simple voices. On the contrary, it is a compound voice that is constituted by a number of expressions, and signifies various things, like Cut, and Reverse, which are species of the genus Slash, and signify various things. But it should be noted that there are compound voices by the number of expressions, which are simple by the singular they signify; e.g. Diagonal Cut, Vertical Cut, which are compound voices as to the number of expressions, and simple, by the singular meaning, that this happens, when the Genus, and the Difference join in the composition.
Another division is considered in two other modes, resulting from the voice, and the term, like synonymous voice, and homonymous voice. A simple synonymous voice is one that signifies many singulars in a same generic reason, like Thrust, Slash. A homonymous voice is the one that signifies various things with a single voice, which in vulgar is called equivocal.
Another distinction is considered in common voice, and in singular voice: a common voice is properly generic, because with a predicamental term it signifies various singulars, such as Thrust, which is a common voice to puncture wounds: and Slash, to cutting wounds. A singular voice is the one that is assigned to a singular species, like Cut, Reverse, Thrust. Other differences are found in Logicians, and Metaphysicians, which are more suitable for other sciences, than for that of the Sword, where the proposed ones are sufficient.
Scotus, in proof of the production, and number of these voices, resolves (by authority of Porphyry) that they are five, and no more; although, placing them in different ways, considering that the Universal, either signifies substance, or accident. If substance, in whole, or in material part, it will be Genus: if formal, it will be Difference: if in all substance, it will be Species, which tells the being of the immediate individuals to the Genus: if accident, either it is convertible, or it is not convertible? If it is convertible, it is Proper; if it is not convertible, it is Common Accident, and thus the fifth Universal: and concludes, that as it is not possible (to our understanding) to signify what is said of many, except by these five ways, the Universals are no more than these five.
It is recognized by the doctrine of the Philosopher that in three ways two things are said to agree, or to be of the same reason; this is understood in Genus, in Species, in Number: Because that is said to agree, being of the same genus, which is contained under the nearest Genus; such as Cut and Reverse, whose nearest Genus is Cut, which includes the wounds of cut. The nearest Genus is called that, between which, and the Species there is no other intermediate genus, as you see, that between the Genus Cut, and the Species Cut, and Reverse, there is no other intermediate.
Agreement in Number is understood when one and another thing agree numerically, which can be in five ways: one, when they agree in the same name, and number, such as First Intention Stab, Second Intention Stab, which agree in the generic name, Stab, and in the number for First Intention, and Second Intention, which although they differ in the lowest Species, they agree numerically.
Another, when the definition and the defined are of the same number, like defining the Cut, it will be essential, saying: That it is a wound caused by the edge of the Sword, which agrees with Cut, for being due to the blade, and not to the point, with which the definition and the defined agree in the essence of being a cutting strike.
Another, when the Property and the subject agree in one enumeration, as the subject, and the property, that in this science, the subject is the man, and the property to wound the opponent, by movement, or movements, which are proper in the man, or violent, or natural, etc. which can agree in one enumeration.
Conversely, those that differ in Genus differ maximally; those that differ in Number, differ less; and in both modes, those that agree or differ in Species, differ or agree medially. Like Stab and Cut, which differ maximally by differing in Genus; Vertical Cut and Diagonal Cut, which differ medially by differing in Species; and Cut and half Cut, which differ less by differing in Number from whole to lesser movement.
With the previous principles in this Discourse, the understanding of each of Porphyry’s Predicables, necessary in this Science for the Predicaments of the Philosopher, is facilitated. From his doctrine it is inferred that the Genus is considered first due to the continuous generation that is produced from it. Porphyry defined it, saying: Genus is what is predicated of many different Species: e.g. Stab. The term in Genus is caused by the instrument with which it is executed, considering it as the material cause of the wound, which is made with an Estoc, a type of Sword, which lacks a blade. Therefore, the generic name of Stab is given to all wounds made with the point of a Sword, including such a Genus all wounds, executed with the point of a Sword, reduced its term to the Estoc, because with it you do not wound by cut. Likewise, for the instrumental material cause, all those species of wounds that are committed and executed with a short instrument, moved by the efficient cause of the man’s fist, belong to the genus Dagger Strike. Therefore, the instrument suitable for such generic movements is generically called a Dagger, even if in the lowest species it has another name, like Knife, Dagger, Almarada, etc.
The Genus is considered in two ways, which are Supreme and Interjected, which is the same in common speech as interposed or intermediate. Supreme Genus is understood as That which is such that it cannot be a species. Interposed or Intermediate Genus Is the one that between the Genus and the Species admits the interjection or intermediate of another lower Genus, and this is called remote Genus; e.g., wound is a remote term, because what it produces is the first division into lower genera, such as Cut and Stab, etc. Thus, from the Genus Cut (which is intermediate), the division results in lower genera, which are Slash, Reverse, etc. and these produce species, such as Diagonal, Vertical, etc. up to the most specific.
The questions raised by Logicians and Metaphysicists, whether the meaning of the Genus is material or formal; or if the Genus in common has a material meaning; or if the relation of the Genus is one with that of the Species, or the same nature of the Genus, as to its definition; or if this is descriptive or causal; and if it is descriptive, if the most proper is that of Porphyry: in what way are the Genus and Difference considered and separated; and if the Genus is in potency or in act; and if it is predicated of the Species, as part or as a whole; or if of one or if of many Species: how it is the principle of the Species, and what is the definition of the defined in relation to the Genus? Thus, a multitude of doubts and questions, which the curious can see in the Expositors of Porphyry and Aristotle, and in Logicians and Metaphysicists, from which a volume can be formed, and a catalogue of Authors can be made, which would occupy a lot of paper.
Expositors of Porphyry divide what he discussed about Species as a Universal into eight contexts. Here it can be recognized that this is a homonymous term, because it admits different meanings, since the word Species, taken from Latin, is used in Spanish for a form that is species-like, which is equivalent to Perfection, along with other meanings noted by Ambrosius Calepinus and Passeratius.
Dialecticians and logicians define this term as that species which is placed under an assigned Genus. This definition is consistent with that of Porphyry, who said: Species is that which is included under the Genus, which is predicated of them. And more commonly by the same Porphyry: Species is that which is predicated of many differences in number. And more descriptively: Species is that which, under the same genus (upon which it does not transcend another), is placed at the lowest level, such that no other species is given under it. From all this it follows that the Genus and the Species are relatives, and they mutually define each other, because the knowledge of one depends on the other due to their relationship.
Porphyry places the Species immediately after the Genus because it commits to it, as in this science, where Wound is the highest Genus, above which no other ascends, and its immediate Species is Cut, etc., and its mediated in number, Slash, Backslash, etc. From these principles another definition is formed, saying: Species is that which is predicated of the different in number. By this definition, one inquires what the entity being sought is, like Slash, if it is Diagonal or Vertical, etc., Thrust, if it is of Quarter Circle, etc., searching for the lowest species through the different in number.
The understanding of the Species is divided into intermediate and lowest, because an intermediate one is, being a Species with respect to another Genus, it can be a Genus with respect to another Species; and such are all intermediates between the highest Genus and the lowest Species; in this consideration, those that refer to the lower ones are Genera: e.g., from the Wound in highest genus, its intermediate Species will be Cut, or Thrust, which with respect to the supreme Genus Wound, are Species, Cut, Thrust; and with respect to a lower Species, the Cut is a Genus, and the Thrust is a Genus, as can be demonstrably shown, forming a category from the highest Genus to the lowest Species, which does not admit another after it. This is essential in this Science, in which many questions debated in schools are omitted.
The common Difference (according to Porphyry himself and his Expositors) is that which, by accident, denotes separation from the subject or subjects, demonstrating, for example, how one thing differs from another, or in the same, slow or violent, these are differences by accidents in a subject, to wait or to attack, which are also admitted in combat in different subjects when they fight: and these differences, which are perceived by the physical act in the operation, are physical differences, like metaphysical ones those that are perceived in the understanding by speculation; and because both types are caused by accidents, they are called Differences in common.
The most proper Difference (according to Porphyry and Saint Thomas) is that which shows the distinction and difference according to essence or species; e.g. man and lion; Cut and Thrust, which in essence and species differ most properly, even though they are included in the Genus; since animal includes man and lion; and wound includes Cut, and Thrust; and they are distinguished and recognized in essence and species by the difference.
The third way is when some accident applies to every individual of some species; but, nevertheless, it does not always apply, like Thrust of the Quarter Circle, which is an accident that applies to the individuality of such a Thrust; but not always to the individual of the point wound, which can be in another lowest species.
The fourth way is when some accident always applies to every individual of a species, according to aptitude, but not according to necessity, as happens to man in all passions, in which he has a permanent aptitude in potential, but not in continuous action, such as moving, and moving the instrument with which he works, in which he is permanently potential, but not in continuous action.
Proper is distinguished from common Accident in that the latter does not reciprocate with that which is a common accident, but the Proper does reciprocate with that of which it is proper. From this, it is inferred that the Proper results in a certain way flowing to the nature, and essence, of which it is proper. For this reason, the Proper separates from the common Accident because the Accident does not belong to the pure essence of the thing, of which it is an accident; but the Proper proceeds from the same essence, as from the essential principles of the thing, or subject, of which it is proper.
These conclusions are the most appropriate for this science, so other species and questions that pertain more to Philosophy, Physics, and Metaphysics are omitted here. In these disciplines, it is debated in what way the Proper is generic, or infimum, or interjected, or transcendent: as those curious can see in the Expositors of Porphyry.
This definition is subdivided into separable or inseparable accident from the subject: That is an accident which can exist in a subject; in being, and in not being of the same subject. And by negation it is defined: That is an accident which is neither Genre, nor Species, nor Difference, nor Proper, although it is always in some subject.
Metaphysicians and Logicians expand on this Universal term, explaining the definitions of Porphyry, raising various questions, from which what most applies to this Science is selected, where in terms of movement, it is considered as a common Accident, which can exist, and not exist in the subject of the Skilled, or the non-Skilled without corruption of the same subject, because the operation is according to the differences of the movement’s accident. And separable and inseparable accidents from the subject are also considered; because some are inherent in it, and these are not separable; and others, which are not inherent in the same subject, are separable, as the Expositors of the first and second Definition extensively explain.
However, there are accidents that, in intellectual cogitation, transform into other accidents that are produced by operation, in respect to the accidental nature; for example, in the case of a cutting wound (which is a Slash) and in the case of a puncture wound (which is a Thrust), the Physical agent considers them in relation to their inseparable accidents, which are inherent in the very species of the wound, which the Right-handed determines by first intention; but in the course of combat, such a foreign accident occurs on the part of the opponent, that the Right-handed in intellectual cogitation transforms the cutting wound, which he decided to commit, into a puncture wound, which he executed by second intention, the cutting wound being accidentally transformed into a puncture wound, just as he could also transform the puncture wound of first intention before executing it, into a cutting wound, executed by second intention. Everything will be demonstrated in its proper places, resulting from all this, that in the perfect act by Common Accident, the Accident is neither Genus, nor Species, nor Difference, nor Property, but another fifth Predicable term, which is divided, and diverse from the Predicamental Accident, because the Predicamental Accident looks at what is not Substance, and the Predicamental is the opposite, because it is considered in the substance, dividing into the nine Accidents, which admit categories by the partition of being: it should be considered here, that the Predicable Accident, and the Predicamental Accident differ in various ways, because one is considered A parte rei, (which is according to its real being) and the other (according to its objective being) which is said, and diverse from the same substance, untransformable from accident to accident, in respect to intellectual cogitation; and this alone is Predicable, and Universal term, and the other categorical A parte rei, included in the partition of being, which is dealt with in the Categories of the Philosopher, in which more light is entered, having knowledge of the Predicables of Porphyry, which has been discussed in this Discourse, as useful, and necessary for this Science of understanding, and exercise of the Sword, choosing what is necessary, and excluding what most properly applies to Physics, and Metaphysics, as is disputed in the Schools.