Causes of Error: Misunderstanding and Verbal Ambiguities

1. From fallacies to their causes

The preceding lesson distinguished a fault in the matter of an argument from a fault in its form. That tells us where an argument fails, but not yet why the mistake arose.

The section on causes of error (asbāb al-ghalaṭ) answers that further question. A word may be misread, its meaning may change halfway through an inference, or separate expressions may be combined in the wrong way. Such errors can make an argument appear coherent while undermining its conclusion.

This lesson first identifies the main roots of error, then studies verbal fallacies. Fallacies arising from the meanings themselves form a later discussion.

2. The two basic sources of error

اعلم أن أسباب الغلط مع كثرتها راجعة إلى أمرين
Know that, despite their great number, the causes of error return to two matters.

The first is poor understanding (sūʾ al-fahm): failing to grasp a matter correctly. The second is false propositions resembling true ones (ishtibāh al-kawādhib bi-l-ṣawādiq).

A mistake need not begin with deliberate lying. Sometimes the mind misunderstands its subject; at other times, a false premise looks like a true or immediately evident one. These require different forms of correction.

3. Poor understanding as the first cause

أحدهما: سوء الفهم فقط
The first cause is simply defective understanding.

A reasoner may reach a conclusion before properly identifying the word, relation, or intended assertion. For instance, “the pen broke” may refer to its tip breaking rather than the pen splitting in two. The truth conditions of these readings differ.

The first duty in logical discussion is to understand the exact claim at issue. A formally valid argument about a different meaning does not answer the original question.

4. False premises disguised as true ones

وثانيهما: اشتباه الكواذب بالصوادق
The second is the resemblance of false propositions to true ones.

A claim may resemble a familiar truth in wording or apparent structure. If resemblance is mistaken for truth, an unsound premise becomes the foundation of an argument.

For example, the generalization “whatever cannot be seen is not a body” confuses invisibility with non-corporeality. Something's not being visible is not identical to its being non-material. The fallacy lies in presenting an unwarranted general claim as if it were self-evident.

5. The influence of illusion and its correction

The text connects poor understanding with the soul's immersion in the darkness of imagination or illusion. An ingrained habit or familiar sensory pattern can make alternative possibilities difficult to conceive.

Such psychological force is not a demonstration (burhān). The feeling that a proposition is obvious, unfamiliar, or impossible cannot replace proof.

The commentary emphasizes intellectual examination: investigate the premise, test its implications, and distinguish what is rationally necessary from what only feels compelling.

6. Misunderstanding versus deceptive resemblance

In poor understanding, the speaker's actual meaning is not grasped. In deceptive resemblance, a false proposition is confused with a true one because they look or sound alike.

Example 1: reading “Zayd's brother arrived” as “Zayd arrived” misidentifies the statement.
Example 2: treating “Every human is an animal” as though it entailed “Every animal is human” turns a true universal into an invalid converse.

Both can be understood as a failure to distinguish the thing from what resembles it. The commentary notes this more unified account.

7. Failure to distinguish a thing from its likeness

عدم التمييز بين الشيء وشبهه
Not distinguishing a thing from another thing that resembles it.

This general formula guides the next classification. The resemblance may concern words, when identical or similar expressions carry different meanings, or it may concern meaning and reasoning, when propositions appear alike but differ in their truth conditions.

Similarity is not identity. Sharing a name, quality, or grammatical appearance does not establish sameness of referent or consequence.

8. Verbal and semantic fallacies

فصل: عدم التمييز بين الشيء وشبهه ينقسم إلى ما يتعلق بالألفاظ وإلى ما يتعلق بالمعاني
A failure to distinguish a thing from its likeness is divided into what concerns expressions and what concerns meanings.

In a verbal fallacy, a word may change its sense across an argument, or its grammatical form, spelling, or word arrangement may be misread.

In a semantic fallacy, the words may be clear while the predication or inferential relation is faulty. This level completes the verbal category; the next turns to errors of meaning.

9. Two sources of verbal error

A verbal fallacy may arise from individual terms or from their composition into phrases and propositions.

Term ambiguity: “ʿayn” denotes an eye in one use and a spring in another; an inference may silently treat the uses as identical.
Structural ambiguity: a property of separate elements may be assigned to their combination, or the reverse.

The practical method is to establish each word's sense first, then examine how the words combine to make the proposition.

10. Equivocation through a shared word

وذلك بأن يكون الألفاظ مختلفة في الدلالة، فيقع فيه الاشتباه فيما هو المراد
The expressions differ in signification, producing confusion about the intended meaning.

A term's possessing multiple senses is not itself an error. The error occurs when one sense is used in one premise and another in the next while the reasoner treats them as one middle term.

The Arabic word “ʿayn” may refer to an eye or a water spring. If these senses are exchanged during an inference, the apparent identity of the word conceals a difference of meaning.

11. The textbook’s example of ʿayn

كما تقول لعين الماء: «هذه عين»
For a water spring one may say, “This is a ʿayn.”

“ʿAyn” can denote a spring or an eye; the commentary also discusses its use in relation to the sun. A predicate true of one meaning cannot be transferred to another solely because the expression is shared.

For example, “a spring releases water” and “an eye produces tears” involve different subjects and explanations. Their shared word does not make the predicates interchangeable.

12. How equivocation breaks the middle term

Consider this proposed inference:
1. Every ʿayn is a source of spring-water.
2. The human eye is a ʿayn.
3. Therefore the human eye is a source of spring-water.

In the first premise “ʿayn” denotes a spring; in the second, an eye. The syllogism therefore does not possess a single unchanging middle term.

When the two senses are represented by different terms, the missing connection becomes obvious. This is the fallacy of equivocation, not a valid inference.

13. Confusing literal and figurative use

ويدرج فيه الاستعارة وأمثالها
Metaphor and similar usages also fall within this category of ambiguity.

In the book's example, “asad” can name a lion literally or describe a courageous person figuratively. Saying “Zayd is a lion” need not classify him as a predatory animal.

The inference “Zayd is a lion; every lion lives in the wild; therefore Zayd lives in the wild” illicitly changes from a figurative predicate to a literal kind. A successful metaphor does not secure an identical logical sense.

14. When figurative language becomes fallacious

Not every figurative expression is erroneous. “She is a lamp of knowledge” may properly express intellectual guidance and benefit.

The fallacy begins only when literal physical properties are inferred from that figure: “She is a lamp, so water can extinguish her.” That confuses figurative description with literal classification.

Always establish whether the expression is used literally or figuratively. A syllogism requires continuity of meaning across its premises.

15. Ambiguity from word formation

والثاني ما يتعلق بالألفاظ بسبب التصريف
A second kind of verbal error arises from morphological formation.

Words of similar shape or derived from the same root may differ in voice, grammatical function, and meaning. The source uses “al-mukhtār”, discussing agent and patient readings.

To take a word first as “the one who chooses” and then as “the one chosen” is to change its logical sense. Formal resemblance alone is insufficient; morphology, context, and intended reference matter.

16. Al-mukhtār: agent or patient?

The textbook selects “al-mukhtār” because morphological developments may make forms associated with agent and patient appear alike while retaining distinct analyses.

In one context it can mean the chooser; in another, the chosen one. A claim about an agent does not automatically apply to someone receiving an action.

The reading must be established by the Arabic context and grammatical derivation, not by an indiscriminate English or Urdu gloss. Confusing these analyses creates a verbal fallacy.

17. Ambiguity of vowels and pointing

أو بسبب الإعجام والإعراب
Or the ambiguity may arise from consonantal pointing and inflectional vowels.

Iʿjām distinguishes letters by dots, as with jīm, ḥāʾ and khāʾ. Iʿrāb and vocalization can alter grammatical role and sometimes meaning.

An unpointed or unvocalized string may allow more than one reading. An inference that begins with one reading and ends with another has silently changed its premise. Correct reading and linguistic context must be established first.

18. Ghulām Ḥasan: two parses

The book uses “ghulām ḥasan” as an example of ambiguity between grammatical relationships and description.

«غلامُ حَسَنٍ» — the servant of a person named Ḥasan, an iḍāfah construction.
«غلامٌ حَسَنٌ» — a handsome boy or servant, a noun with an adjective.

The first expresses a relation to a named person; the second attributes a quality. They cannot be treated as making the same claim. Case endings and construction can change the proposition being assessed.

19. Mistakes from unpointed or faulty writing

The commentary also notes ambiguity from missing dots or faulty writing. Arabic letter forms can resemble one another while differing in the dots that identify them.

For example, “khabar” (a report) and “ḥibr” (ink, in a different consonantal pattern) are different expressions and should not be conflated because a script is unclear.

When a manuscript is unpointed or copied inaccurately, the reading must be checked against grammar, context, and reliable textual witnesses before building an argument upon it.

20. How to fix the meaning of a term

Before reasoning from an expression with several readings, establish four things:
1. Text and vocalization: which letters and marks are present?
2. Morphology: does the form indicate agent, patient, or another function?
3. Syntax: is it an adjective, genitive term, or predicate?
4. Context: what sense does the speaker intend?

Without these checks, examples like “mukhtār” or “ghulām ḥasan” may support several incompatible propositions. An unsettled meaning cannot yield a determinate demonstration.

21. Fallacies arising from composition

Verbal error is not confined to single words. Individual terms may be clear while their composition or separation alters the proposition expressed.

A pronoun may be assigned the wrong antecedent; properties true separately or in different respects may be attributed jointly in the same respect; or a predicate of a whole may be assigned to each part.

The question is always which logical proposition the sentence actually expresses, and what additional assertion is being smuggled in by an altered grouping.

22. Ambiguity of a pronoun’s antecedent

The main text illustrates this with «ما يعلمه الحكيم فهو يعمل ما يعلمه», in which the antecedent of a pronoun affects what is being asserted and whether it is true.

A pronoun may appear to refer to the nearest word, while context points elsewhere. If an argument silently assigns it different antecedents in different places, it no longer preserves the original claim.

The practical repair is to replace the pronoun with its proposed explicit antecedent and read the proposition again. This reveals which judgment each reading entails.

23. Separating a compound claim: the bitter-orange example

«النارنج حلو حامض»
The bitter orange is sweet and sour.

The book uses this to illustrate how distinct qualities may belong to an object in different respects, while an argument wrongly treats them as predicated in precisely the same respect.

A bitter orange may combine sweetness and sourness in its overall taste without every constituent independently possessing both pure qualities. The predication of the whole must be distinguished from what is claimed of its parts.

24. Joining separate predicates incorrectly

«زيد طبيب وماهر»
Zayd is a physician and is also skilled.

The textbook contrasts a pair of separate predicates with a combination that attaches the skill specifically to medicine. Being a physician and being skilled do not alone establish being a skilled physician; the skill might concern another field.

Thus, from “Zayd is a physician and is skilled,” one may not infer “Zayd is a skilled physician” without additional information. Two separate truths do not automatically justify a more specific combined predicate.

25. Fixing compositional fallacies by identifying scope

To repair compositional ambiguity, identify the scope of qualifiers and predicates, rather than merely counting words.

Example 1: “Zayd is learned and a poet” — two properties belong to him.
Example 2: “Zayd is learned in poetry” — now the object of his learning is poetry; the first does not entail this.
Example 3: “All students read a book” — the sentence may mean one common book or a possibly different book per student.

Specify the intended scope before drawing a conclusion. Explicit rewriting often exposes the hidden shift.

26. Comparison of the verbal fallacies

The remedy for a verbal fallacy depends on the location of the ambiguity.

CauseWhat changes?
EquivocationThe sense of a shared term
Literal / figurative useThe kind of predication
MorphologyAgent versus patient reading
Vowels or dotsReading or syntactic relation
CompositionScope of pronoun, qualifier, or predicate

All of these can break the constancy of meaning required by an inference; identifying the particular cause is the first step in correcting it.

27. A valid-looking form with a shifting meaning

Grammatically complete premises need not form a sound argument. The apparent arrangement and the unchanging meaning of the middle term are separate requirements.

For example, “Every lion is an animal; Zayd is a lion; therefore Zayd is a predatory animal” has an apparent first-figure shape, but “lion” may be literal in the first premise and figurative in the second.

Checking the stated propositions alone is not enough. The sense of each logically repeated term must remain constant across the argument.

28. A worked checklist for verbal arguments

Examine a suspicious argument in this order:
1. State the claim: what conclusion is being established?
2. List repeated terms: which expression appears more than once?
3. Assign one sense per occurrence: is the referent unchanged?
4. Check grammar and composition: where does each modifier or pronoun attach?
5. Test the inference: does the conclusion still follow once the meanings are fixed?

This approach distinguishes the particular faults illustrated by “ʿayn,” “asad,” “mukhtār,” and the physician-and-skilled-person case.

29. Synthesis of the section

The chapter explains two fundamental roots of error: failure to understand and mistaking falsehood for truth because of resemblance. A unifying diagnosis is the failure to distinguish a thing from what resembles it.

Verbal ambiguity occurs both in single terms and in composed expressions. Equivocation, metaphor, morphology, vowels, pointing, pronoun reference, and the joining or separation of predicates have different causes, but each can undermine the continuity of meaning within an argument.

The next section treats fallacies arising from meaning, where a proposition or syllogism can be defective even when its words are understood correctly.