Complete essence, shared essence and the logic of answering what things are Read the bilingual lesson for Mā Huwa: Asking What a Thing Is and test your understanding with a focused quiz.
Lesson
1. From the five universals to a new question
In the previous lesson you learned genus, species, differentia, property and common accident. Now consider what kind of answer a question about essence requires.
Example 1: What is a human?
Example 2: What essential feature is shared by humans and cows?
The first asks about one species; the second asks for a common essential aspect of two species. This is the key to the technical question mā huwa.
2. What does mā huwa ask?
The text explains that logicians use mā huwa—literally, “What is it?”—to ask about the essence of a thing. The aim is not merely to discover its name. An appropriate answer identifies what the thing is essentially, or what essence is shared among the things grouped in the question.
3. Asking for a name versus an essence
“Who is this?” can be answered “Zayd,” which identifies an individual. “What is a human?” asks about human essence, so “Zayd” or “Amr” is not an adequate definition. Always first identify what kind of information a question demands.
4. The full essence of one species
The book asks “al-insān mā huwa?”—what is a human? Its classical logical answer is “ḥayawān nāṭiq” (rational animal). “Animal” gives the shared essential genus; “rational” gives the distinguishing differentia. Together they state the species’ complete essence in the book’s traditional framework.
5. Why “animal” is not a complete answer
Calling a human an “animal” states an essential common aspect, but not the complete specific essence. Cows, horses and goats are also animals. When the question seeks the full essence of human beings, the common genus must be joined with the distinguishing differentia.
6. What nāṭiq means in classical logic
In classical logic, nāṭiq does not merely mean producing spoken sounds. It refers to the distinctively rational or intellectually discerning capacity attributed to humans.
A speech-impaired human remains human.
A parrot repeating words does not thereby possess the classical differentia nāṭiq.
The technical sense matters more than the ordinary surface meaning.
7. Why the two elements belong together
The expression “rational animal” is not a random list of attributes. “Animal” is a genus: an essential notion shared by several species. “Rational” is a differentia: the essential distinguishing feature of the specified species. Their combination forms its classical definition.
8. Two species: find the shared essence
The book next asks what humans, cows and goats are. Since the question groups different species, it seeks their common essential character. The answer is “animal.” The differentia “rational” belongs to humans in the classical scheme, not to all three species.
9. The right answer depends on the set named
One expression can be adequate in one context and incomplete in another.
“What is a human?” — rational animal, the full specific essence.
“What are humans and cows?” — animal, their shared essential genus.
What matters is which species are being compared and what their essential commonality is, not a mechanical count of words.
10. Many individuals are not necessarily many species
Zayd, Amr and Bakr may be three individuals but belong to one species: human. Humans, cows and goats, however, are distinct species with the shared genus “animal.” More individuals do not necessarily mean more species. This distinction helps determine the appropriate answer to mā huwa.
11. Humans and trees: a broader common genus
The text compares humans with trees. “Animal” no longer applies to both, since a tree is not an animal. The shared traditional category is jism nāmī, a body capable of growth. This genus is broader than “animal,” because it includes plants as well.
12. Understanding the category “growing body”
Jism means body, and nāmī refers here to the capacity for growth.
A tree is a growing plant body.
A human is likewise bodily and undergoes growth.
Thus both fall under the broader classical category “growing body.” This is a traditional logical classification, not an exhaustive modern biological taxonomy.
13. What changes when a stone is added?
Now compare a human, a tree and a stone.
Human: a growing body.
Tree: a growing body.
Stone: a body, but not growing in the textbook’s relevant sense.
Therefore their shared essential description is “body,” a broader category than “growing body.”
14. The progression in the book’s longer example
The book groups examples such as humans, oxen, trees, pomegranate trees and stones. As the set widens, the common essential category becomes broader.
Individuals of one species — a species-level answer can work.
Different animal species — animal.
Animals and plants — growing body.
Animals, plants and stones — body.
15. An expanding hierarchy of essential concepts
Keep this conceptual hierarchy in mind: human → animal → growing body → body. The arrows do not describe physical transformation. They show movement from a narrower essential category to broader ones. Every upward step covers additional types of things, while giving fewer distinguishing details about the original species.
16. What a broader answer achieves—and omits
“A human is a body” is broad and true within the lesson’s scheme but does not distinguish humans from plants or stones. “A human is an animal” is more specific but still shared with other animals. “A human is a rational animal” supplies the full classical specific definition. A true essential description need not be a complete definition.
17. Essential commonality versus accidental similarity
Suppose a human and a horse are both white. Whiteness may be common to them, but it is accidental, not an element of their essence. Therefore “white” is not an appropriate answer to mā huwa about humans and horses. The question asks for common essential content, not a coincidental color, location or temporary condition.
18. Not every ordinary “what is it?” is technical mā huwa
In daily life, “What is this?” may only ask for an object’s name or use; a child might answer “a pen.” In formal logic, however, mā huwa is a technical request about essence. Judge the answer using the book’s framework of essence, genus and differentia, not every ordinary use of a similar-sounding question.
19. Connecting mā huwa to the five universals
Three universals now become useful. Species designates a complete species essence; genus is an essential feature shared by species; differentia distinguishes one species essentially.
“What is a human?”—the full definition uses genus and differentia.
“What are humans and cows?”—a common genus can answer.
The next lesson will examine near and remote genera in greater detail.
20. Worked example: human and horse
Question: What are a human and a horse?
Step 1: They are different species.
Step 2: They both count as growing bodies, but that is broader than necessary.
Step 3: The more specific shared essential category is animal.
Answer: “animal” is suitable because it states their shared animal nature.
21. Worked example: human and mango tree
Question: What are a human and a mango tree?
Step 1: Humans are animals, whereas mango trees are plants.
Step 2: “Animal” is therefore not shared by both.
Step 3: In the book’s classical framework, both are growing bodies.
Answer: “growing body.” The mango tree is a supplementary teaching example applying the textbook rule.
22. Worked example: horse, tree and stone
Question: What are a horse, a tree and a stone?
Step 1: Only the horse is an animal.
Step 2: The horse and tree are growing bodies, but the stone is not.
Step 3: All three count as bodies in the textbook’s scheme.
Answer: “body.” Adding a fundamentally different kind of thing can make the common answer broader.
23. Diagnosing inadequate answers
Error 1: “Human and tree are animals”—false, because a tree is not an animal.
Error 2: Answering “rational” for human and cow—this is not common to both in the classical definition.
Error 3: Answering “white” for human and horse—color is accidental, not essential.
Test whether the proposed answer covers everything in the question and whether it is an essential, not accidental, feature.
24. Three checks for an answer
Use three checks when answering mā huwa:
1. Is the question about one species’ complete essence or several species’ shared essence?
2. Does my answer apply to all the things named?
3. Is it essential rather than accidental?
Then choose a full specific definition or an appropriate common genus.
25. Recap: why mā huwa matters
Mā huwa is the technical question about essence. For one species, an answer combining genus and differentia can state its full essence. For several species, seek their common essential character.
Human — rational animal.
Human, cow and goat — animal.
Human and tree — growing body.
Human, tree and stone — body.
The next lesson develops the distinctions between proximate and remote genus and differentia.
Practice questions
Question 1
What is the technical purpose of mā huwa?
- To ask a name
- To ask a thing’s essence
- To ask its age
- To ask its location
Question 2
What is the book’s answer to “al-insān mā huwa”?
- Body only
- Rational animal
- White only
- Tree
Question 3
Why is “animal” alone incomplete as the full essence of human?
- It is meaningless
- It also covers other animal species
- It is a common accident
- It applies to nothing
Question 4
What role does “animal” play in “rational animal”?
- Genus
- Differentia
- Property
- Common accident
Question 5
What is “rational” in the classical definition of human?
- Common accident
- Differentia
- Remote genus
- Temporary state
Question 6
What does nāṭiq chiefly mean in this technical setting?
- Repeating words
- Distinctive rational capacity
- Speaking loudly
- Laughing
Question 7
What is the common essential answer for human, cow and goat?
Question 8
What is shared by humans and trees in the book’s scheme?
- Animal
- Growing body
- Rational
- Stone
Question 9
What essential category is common to human, tree and stone?
- Animal
- Rational
- Growing body
- Body
Question 10
What does jism nāmī refer to here?
- A named body
- A body capable of growth
- Only an animal
- Only a lifeless stone
Question 11
Do three individuals Zayd, Amr and Bakr necessarily represent three species?
- Yes, each person is a species
- No, all three may be human
- Yes, because their names differ
- No, because they are meaningless
Question 12
How does “animal” compare with “human” in scope?
- Broader
- Narrower
- Equal
- Meaningless
Question 13
How broad is “growing body” relative to “animal”?
- It is narrower
- It is broader, including plants
- They are unrelated
- It means human only
Question 14
Which concept is broader than “growing body”?
Question 15
Why does shared whiteness not answer mā huwa for humans and horses?
- Whiteness is accidental, not essential
- Whiteness never occurs
- A horse is not an animal
- Whiteness is always false
Question 16
What does “Zayd” answer in response to “Who is this?”?
- The full human essence
- Individual identity
- Proximate genus
- Remote genus
Question 17
Why is “rational animal” wrong for human and cow together?
- It is not common to both
- It has no meaning
- It defines trees
- It is a common accident
Question 18
What should you check first when identifying the essence shared by two species?
- Fits only one
- Fits both and is essential
- Sounds attractive
- Is the longest
Question 19
What is the more appropriate shared essential category for human, cow and tree?
- Animal
- Growing body
- Rational
- Human
Question 20
What is shared by human, cow, tree and stone?
- Animal
- Growing body
- Body
- Rational
Question 21
What kind of answer is “rational animal” to “What is human”?
- A mere name
- A complete specific definition
- A temporary state
- A common accident
Question 22
What is the drawback of answering “body” for humans and horses?
- They are not bodies
- It is unnecessarily broad
- It is a differentia
- It applies only to humans
Question 23
Why does “animal” fail for human and tree?
- It is too short
- A tree is not an animal
- A human is not an animal
- A tree is not a body
Question 24
How can technical mā huwa differ from ordinary “What is it?”?
- It asks about essence
- It always asks price
- It has no answer
- It only asks a name
Question 25
Which sequence runs from more specific to more general?
- Body, human, animal, growing body
- Human, animal, growing body, body
- Animal, body, human, growing body
- Growing body, human, body, animal
Question 26
What is the principal distinction between growing body and body?
- They are identical
- Growing body includes the qualification of growth
- Body applies only to plants
- Growing body is reserved for stones
Question 27
Which sort of answer is generally inappropriate to technical mā huwa?
- Common essential character
- Species essence using genus and differentia
- A merely accidental color
- A suitable shared genus
Question 28
If a new item makes the old common answer fail, what should you do?
- Repeat the old answer
- Find a broader common essential concept
- Ignore the new item
- Choose any accidental feature
Question 29
Why can “human is a body” and “human is an animal” both be true?
- They have exactly the same scope
- One is broader; the other is a narrower essential description
- Both are colors
- Neither has meaning
Question 30
In the book’s example, what do cows and goats essentially share?
Question 31
Which question asks for the full species essence of human?
- Where is Zayd?
- What is a human?
- How old is Zayd?
- Where does a human live?
Question 32
Why is “growing body” used for human and tree?
- They are the same species
- Both are bodily and have growth in the classical scheme
- Both are rational
- Both are stones
Question 33
Which expression combines genus and differentia?
- Rational animal
- Body
- White
- Zayd
Question 34
Why is a property not a full essential definition in the five universals?
- Property is always essential
- Property is an accident outside the essence
- Property is meaningless
- Property only marks location
Question 35
What is meant by shared essence among distinct species?
- Same age
- An essential concept predicable of them all
- Same color
- Same proper name
Question 36
What is wrong with answering “Zayd” to “What is a human?”?
- It names an individual rather than defines the species
- It has too many letters
- It is a proximate genus
- It is a body
Question 37
Which earlier topic best supports understanding mā huwa?
- Word count only
- Five universals and essence
- Past-tense verbs
- Noun inflection
Question 38
Technical mā huwa always asks for a thing’s name.
Question 39
Humans and cows are different species but both are animals.
Question 40
Animal remains common to a human and a tree.
Question 41
Growing body is broader than body in the book.
Question 42
A genus can express what several species essentially share.
Question 43
A generally applicable term must always be a full essential definition.
Question 44
Shared whiteness does not by itself establish shared essence.
Question 45
Human, animal, growing body, body runs from narrower to broader.
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