Arguments of the Sophists: Immediate Knowledge, Inference and Replies

1. The skeptical argument and its target

أَدِلَّةُ السُّوفَسْطَائِيَّةِ
The arguments of the sophists.

A radical skeptic may argue that knowledge is either immediate or attained by reasoning. Immediate cognition can err, while reasoning depends upon prior cognition. If the foundation can be doubted, the resulting conclusion can supposedly be doubted as well.

The argument proceeds through three steps: the senses sometimes mislead us; supposedly self-evident judgments may be contested; and reasoned conclusions depend on such prior judgments.

The decisive distinction is between the claim that error happens in some cases and the much stronger claim that correct knowledge is impossible in every case. The latter does not follow merely from the former.

2. Immediate and inferential knowledge

Knowledge is distinguished according to how it is acquired. Necessary or immediate knowledge does not, in the relevant case, require constructing an explicit argument. Inferential knowledge is reached by considering premises and drawing a conclusion from them.

Directly experiencing pain or seeing light can exemplify immediate awareness. Working through several premises to resolve a difficult question exemplifies inferential inquiry.

The distinction matters because an inference presupposes some earlier knowledge. If all our evidence consisted of inferences alone, we would need to ask where the chain begins. The response examines both the presence of basic cognitions and the soundness of the reasoning that builds upon them.

3. Seven commonly listed forms of necessary knowledge

The classical discussion names seven familiar kinds: first principles, external sense perceptions, inner awareness, propositions with their immediate proofs, experiential judgments, intuitive insights, and massively transmitted reports. They differ in the way assent is produced.

First principles become evident once their meanings are grasped. External senses concern seeing and touching; inner awareness concerns one's present states. Some propositions carry an obvious middle term. Experience involves repeated observations, intuition a swiftly recognized connection, and transmission a convergence of independent reports.

The sevenfold list is a useful map rather than a guarantee that all thinkers place every category at exactly the same epistemic level. Whether a given category is strictly immediate, inferential in disguise, or dependent on conditions remains a further question.

4. First principles and their evident connection

الْكُلُّ أَعْظَمُ مِنَ الْجُزْءِ
A whole is greater than its part.

This example assumes a part genuinely contained within the whole and a relevant comparison of quantity or extent. Once those concepts are properly specified, the relation need not be established through repeated experiments.

With first principles, a crucial task is conceiving the subject and predicate accurately. If someone uses “part” or “whole” in different respects, apparent disagreement may arise without defeating a properly specified principle.

One must therefore distinguish an evident judgment from a confused expression of that judgment. A failure to understand terms is not itself a counterexample to the correctly understood principle.

5. External senses as sources of knowledge

النَّارُ حَارَّةٌ
Fire is hot.

The example treats awareness of heat as connected with sense perception. Other examples include seeing a color and hearing a sound under suitable conditions. An accurate judgment also requires knowing the circumstances of observation and the specific property being perceived.

A distant object may look blurred; a straight object in water may look bent; the appearance of a color may change under different lighting. Such cases invite us to distinguish an appearance from an inference about the external object.

Recognizing the senses as genuine sources of knowledge does not imply that every sensory impression or every judgment based on it is infallible.

6. Inner awareness and first-person states

الْوِجْدَانِيَّاتُ
Direct awareness of one's own inner states.

Joy, grief, pain and similar present experiences are examples of inner awareness. Another person may learn of my pain through my report or outward signs, while I experience the pain directly.

Two propositions should not be confused. “I am feeling pain” concerns immediate awareness; “this pain is caused by a particular disease” adds a diagnosis that requires further evidence.

Recognizing this distinction shows how certainty about an experience may coexist with error about its explanation. Rejecting a causal interpretation does not make the experienced state unreal.

7. Propositions accompanied by their proofs

الْأَرْبَعَةُ زَوْجٌ
Four is an even number.

The judgment is immediately accompanied by its reason: four can be divided into two equal groups of two. Such a proposition is traditionally called one whose syllogism is present with it; its connecting middle term is readily available to the mind.

Likewise, recognizing that six is even involves seeing how it divides into two groups of three. The reasoning is genuinely relevant, even when so obvious that it is hardly experienced as a separate chain of steps.

This category highlights the distinction between merely recalling the label “even” and understanding the short reasoning that establishes it for a particular number.

8. Experiential judgments and repeated observation

الْمُجَرَّبَاتُ
Judgments acquired through repeated experience.

The historical example concerns the purgative effect attributed to a medicinal substance. The purpose here is not to recommend treatment but to illustrate how repeated observation can support a judgment about an object's customary effect.

Repetition alone is not a magic guarantee of certainty. One must consider whether observations were comparable, whether another cause could explain the outcome, and how far the conclusion may reasonably be generalized.

“I observed an effect once” is a report of one event. “Under relevant conditions this cause regularly produces that effect” is a broader experiential claim and requires stronger justification. That difference matters when assessing the force of empirical knowledge.

9. Intuitive insight and rapid inference

الْحَدْسِيَّاتُ
Cognitions in which the mind swiftly recognizes an explanatory connection.

A classical example is recognizing that moonlight is derived from sunlight, an inference associated with observations of the changing illuminated portion of the moon and its relation to the sun. Intuition here is not an unsupported hunch; it is a rapid grasp of a relevant middle term.

One person may identify the connection after prolonged study, while another sees it quickly. Speed of recognition and the existence of supporting reasons are separate matters.

An intuitive judgment still requires scrutiny. The speed with which it arises does not by itself establish its truth; its evidential connection remains important.

10. Mass transmission as a route to certainty

بَغْدَادُ مَوْجُودٌ
Baghdad exists.

This illustrates knowing about an object or place that the hearer may never have directly seen. When numerous independent and convergent reports make joint fabrication or error ordinarily untenable, their combined testimony can yield certainty.

Tawātur is not just repeated circulation of the same unsupported story. If a hundred people reproduce one unverified original report, their number does not automatically provide a hundred independent testimonies.

The larger lesson is that direct observation is not the only path to knowledge of external realities. Well-grounded transmission can establish facts beyond our personal experience.

11. Why the classification is disputed

After listing the seven kinds, the discussion notes that thinkers have disputed whether experience, intuition and mass transmission are necessary in precisely the same way as first principles or immediate awareness.

The dispute does not by itself make all such knowledge worthless. It concerns how the knowledge is acquired and how its certainty is assessed. Recognizing a simple mathematical relation and knowing a distant city's existence from independent reports are different cognitive processes.

A disagreement over the taxonomic boundaries of a knowledge category cannot, without additional argument, justify the conclusion that no category delivers knowledge at all.

12. First skeptical objection: sensory error

وَالْحِسُّ قَدْ يَغْلَطُ كَثِيرًا
The senses may frequently err.

The objection begins from a real phenomenon: visual or gustatory experience can be distorted under certain conditions. It then infers that sensory knowledge as a whole cannot be certain.

The first observation is sound; the global conclusion requires a further argument. If a particular cause distorts vision, not every observation follows under that same distorting condition.

“Some sensory judgments are mistaken” is a particular claim, whereas “all sensory judgments are mistaken” is universal. The first does not establish the second. This shift in scope is the central point to examine when evaluating the objection.

13. Seeing double and diagnosing the error

كَالْأَحْوَلِ يَرَى الْوَاحِدَ اثْنَيْنِ
As when someone sees one thing as two.

The example presents a single external object but a doubled visual appearance under an abnormal condition. “It appears double to me” reports an experience; “there are actually two objects outside” makes an additional claim about reality. The two are not equivalent.

The external claim can be tested by changing the viewpoint, checking the object by other suitable means, or using corroborating evidence. Identifying the cause of an illusion makes correction intelligible.

The example therefore supports careful evaluation of perception; it does not establish that every external judgment based on the senses must be false.

14. Altered taste and a historical medical example

وَالصَّفْرَاوِيُّ قَدْ يَجِدُ الْحُلْوَ مُرًّا
A person described as affected by yellow bile may find sweetness bitter.

The text uses a historical medical explanation for altered taste. The aim is not to assert a modern diagnosis but to show that a person's sensory experience may differ under particular bodily conditions even when the external object remains the same.

Imagine that medication changes someone's sense of taste. The person may truthfully report the altered experience, but this does not establish that the food's external properties have changed for everyone under every condition.

The epistemic lesson is to identify the special cause of the variation instead of treating it as a refutation of sensory knowledge in all normal circumstances.

15. Why a local sensory failure is not universal

غَلَطُ الْحِسِّ فِي الْبَعْضِ لِأَسْبَابٍ جُزْئِيَّةٍ
Sensory error in some cases arises from particular causes.

Poor lighting, impaired eyesight and great distance are distinct conditions that may produce particular mistakes. If an error is connected with such a condition, its occurrence is compatible with reliable observation when that condition is absent.

For example, mistaking a rope for a snake in darkness does not count against correctly recognizing the same rope in daylight. Indeed, the second observation may help correct the first.

The argument does not promise that one perception reveals everything. It establishes only that a few identifiable failures do not defeat every possible instance of perceptual knowledge.

16. Second objection: disagreement over the self-evident

وَمِنْهَا بَدِيهِيَّاتٌ وَقَدْ تَقَعُ فِيهَا اخْتِلَافَاتٌ
Among these are self-evident judgments in which disagreements may arise.

The skeptic objects that even claims presented as self-evident are disputed, sometimes requiring subtle arguments to resolve objections. How, then, can they be called immediate and certain?

Two preliminary questions are important. Are the disputants affirming and denying the very same proposition in the same respect? And is their disagreement about the basic judgment itself, or about the wording, an additional premise, or a derived implication?

Calling a proposition “self-evident” is an assertion about its status, not a demonstration that it possesses that status. The actual content and grounds of the claim must be examined.

17. Examples of competing claims of obviousness

The passage illustrates disagreement by referring to claims made in different theological and philosophical schools. Some Muʿtazilites regarded human authorship of acts as obvious; some philosophers regarded preference between alternatives without a determining factor as impossible; Ashʿarite disputants contested certain such claims.

These examples report rival assertions of obviousness, not full proofs of each school’s position. The point is that one party's labeling a disputed doctrine as self-evident does not settle the matter for another party.

If a judgment contains technical terms, hidden premises or distinct respects, these must be clarified. A complex theoretical dispute is not resolved simply by declaring one side's conclusion “plainly evident.”

18. Failure to grasp a concept versus failure of a principle

Disagreement may result from inadequate understanding of a subject or predicate. Before assessing their connection, one must clarify what each term means. Thus an obscured conception should not automatically be equated with a false first principle.

Words such as “cause,” “choice,” and “preference” may be used differently by rival disputants. Their apparent answers can then concern distinct propositions rather than one identical proposition.

Clarifying meanings will not settle every dispute: one side may still argue incorrectly. But the possibility of a particular reasoning mistake is a reason for case-specific examination, not a warrant for denying all foundational knowledge.

19. Third objection: inference depends on basic knowledge

وَالنَّظَرِيَّاتُ فَرْعُ الضَّرُورِيَّاتِ
Inferential cognitions are derivative of necessary cognitions.

The dependence is genuine: reasoning begins from premises that must ultimately be known or justified. If every premise required a new proof and that requirement never ended, a conclusion could never be established.

The skeptic goes further: because some immediate judgments can be challenged, all inferential knowledge is allegedly undermined. But particular errors in basic cognition and the universal destruction of basic knowledge are not the same claim.

Unless the foundational category has been defeated wholesale, its derivative category does not fail merely because it depends upon the foundation.

20. The regress of reasons and its stopping points

If a conclusion needs a proof, that proof relies on premises. We can ask for the premises' justification, and continue doing so. This is the problem of the regress of reasons.

Imagine asking “Why is this result true?” and receiving a premise. If every premise always required an entirely new premise, with no terminating source of knowledge, the original proof would never finish.

The response is that some basic cognitions must be available for any successful inference. Dependence on those cognitions does not automatically make inference defective; it indicates that both the starting points and the transitions between them require soundness.

21. Disagreement among theorists and the truth of conclusions

وَلِهٰذَا كَثُرَ فِيهَا اخْتِلَافُ الْعُقَلَاءِ
Hence there have been many disagreements among reasoners about them.

Theoretical questions do produce substantial disagreement. One argument may appear strong to one scholar and weak to another, and a hidden mistake may remain in a chain of reasoning. None of this establishes that no correct conclusion is possible.

If two people calculate different results, the proper response is to examine their assumptions and steps. Their disagreement does not show that arithmetic has no correct answers.

Widespread disagreement calls for scrutiny. Treating it as a proof that all theoretical knowledge is false would itself be a theoretical inference in need of justification.

22. Faulty reasoning does not erase objective truth

كَثْرَةُ الِاخْتِلَافِ لِفَسَادِ الْأَنْظَارِ
Frequent disagreement can arise from defective reasoning.

A disputant may use irrelevant evidence, assume a false premise or make an invalid transition. Identifying such a defect does not dissolve the reality under investigation; it shows that the inquiry must follow more careful principles.

For example, a conclusion drawn from unrelated premises can be unsupported even if there is, independently, a true answer to the original question.

Two assessments must be kept distinct: whether the presented reasoning succeeds, and what is in fact true about the matter. Confusing the validity of an argument with the existence of truth leads from methodological criticism to unjustified skepticism.

23. Shared knowledge as a condition of rational debate

لَا يَعْتَرِفُونَ بِمَعْلُومٍ لِيَثْبُتَ بِهِ مَجْهُولٌ
They acknowledge no known premise by which an unknown matter can be established.

Argument requires at least some shared premises or agreed standards for evaluating them. If one side refuses every basic observation, every report and every principle of inference, no proposed proof can bind that side on its own terms; its very starting points will be denied.

The difficulty is especially clear in the most radical form of the “I do not know” position. This is not a refutation of logic. It identifies a practical limit of debate when one participant refuses any common criterion for settling what follows from what.

24. A polemical statement and its limits

The passage closes its discussion of radical skeptics with a severe polemical expression involving punishment by fire, presented as an alternative to argument with people who acknowledge no shared knowledge.

It must not be treated as a practical authorization for violence or as a religious ruling permitting harm to dissenters. The accompanying explanation itself raises legal objections to punishment by fire. Intellectual disagreement does not confer a license to injure anyone.

The academically relevant point is the earlier argument: debate cannot progress normally when all premises and standards are refused. The appropriate scholarly response remains careful reasoning, conceptual clarification and fair examination of evidence.

25. Sophistry, deceptive wisdom and the next topic

الْحِكْمَةُ الْمُمَوَّهَةُ
Wisdom that only appears genuine but is deceptive.

The text associates “sophistry” with apparent wisdom that masks confusion or misleading argument. Not everyone who asks questions or challenges a proof is therefore a sophist. Responsible inquiry tests evidence; radical sophistry here denotes a stance that rejects the possibility of establishing any truth.

The central conclusion is that real sensory errors and theoretical disagreements do not by themselves make knowledge impossible. They instead prompt closer examination of sources, conditions and valid methods of inference.

The next independent unit begins with أَسْبَابُ الْعِلْمِ, the causes or routes of knowledge and the meaning of knowledge itself.