The Lamp of Ignorance-Theory: One Hundred Sixteen

Vedanta employs Nyaya's absence-theory (abhava-tattva) partially, declaring: that which is not real across past, present, and future, yet appears in some substratum, is false. Such an entity is neither wholly true nor wholly false, but intermediate—apparent, yet eternally absent. This state is called sadsadvilakshana, meaning "neither true nor false"—an existence dependent solely on appearance.

The theory of absence is a distinctive doctrine of Nyaya-Vaisheshika philosophy, where the non-existence of something is also considered a real category. Nyaya asserts that absence means the not-being of an object at a particular time or place. This is not mere imagination but reality, because we also perceive absence—as in "there is no pot here." Hence absence too is a knowable entity, and in Nyaya it is recognized as the seventh category.

In Nyaya philosophy, "padarthas" means categories of existence—all things or entities that can become objects of knowledge. Nyaya recognizes seven categories: substance (dravya), quality (guna), action (karma), universal (samanya), particular (vishesha), inherence (samavaya), and absence (abhava). In this list, "absence" (non-existence) is also taken as a distinct real entity—because the knowledge of "not being" is knowledge nonetheless.

Substance: That which exists independently and serves as the substratum of qualities and actions. Examples—earth, water, fire, air, space, time, direction, soul, mind.

Quality: That which is not independent but inheres in substances and manifests their attributes. Examples—color, taste, smell, number, weight.

Action: Movement or activity occurring in substances, which induces change of position in the substance. Examples—upward motion, downward motion, contraction, expansion, displacement.

Universal: That class-property which exists uniformly in many substances, identifying them as "one species." Examples—cowness in all cows, potness in all pots.

Particular: The unique individual nature of atoms or souls, which completely distinguishes them from everything else. Examples—the distinctiveness of each soul, the individuality of each atom.

Inherence: The inseparable relation between container and contained, which cannot be severed. Examples—the inherence of threads in cloth, the inherence of potness in a pot.

Absence: Non-existence or the state of "not being," which is knowable and recognized in four forms—prior absence (not-being before creation), posterior absence (not-being after destruction), absolute absence (never being), mutual absence (mutual non-identity). Examples—there is no pot on the table now; rope eternally lacks snakehood.

The logical justification for absence being knowable is explained thus: when we say "there is no pitcher on the table," two things are grasped simultaneously in our consciousness—(a) the table (substratum) is perceived, and (b) the cognition of the pitcher's absence also occurs. Nyaya argues that if this "not-being" cognition were completely unreal, then the clear knowledge-experience of "not being" could not be explained. Therefore absence too is knowable—in that sense "absence" is a category.

In Nyaya, "absence" is divided into four types:
Prior absence: Non-existence before origination (the not-being of a pot before the pot is made). This is beginningless but ends with origination.
Posterior absence: Non-existence after destruction (the not-being of that pot after the pot breaks). This has a beginning but is endless for that particular pot.
Absolute absence: Not-being at any time, in any state, in any substratum (rabbit's horn, sky-flower). Uninterrupted non-existence—without beginning or end.
Mutual absence: Mutual non-identity/distinction (a pot is a pot, not cloth; cloth is cloth, not a pot).

In these four types of absence, three concepts are always involved—(i) substratum/locus (where the absence is located), (ii) counterpositive or pratiyogi (that whose absence is determined—like 'pot'), (iii) temporal specification (when the not-being is stated—before/after/always). In "absence of pot on table"—here table is the substratum, pot is the counterpositive, and "now" is the temporal reference.

How "absence" is known—there are philosophical disagreements about this.

Let me first clarify the problem: How does this knowledge of "not being" arise? In philosophy, the question is whether from "not-seeing/not-finding" an object under appropriate conditions, we can directly know "absence," or whether this is merely the result of inference.

Nyaya's fundamental position is that "non-apprehension" (anupalabdhi) is not a separate means of knowledge. Where, if something existed—under all conditions for seeing/hearing (light, distance, absence of obstruction, active senses and attention)—seeing/hearing would naturally occur, yet no seeing/hearing happens—there it is reasonable to infer "absence." That is, 'not-seeing' itself is not evidence; 'not-seeing + all conditions for seeing were present'—from this combination we reach the conclusion of "absence." This is inference dependent on 'anvṛtti' in Nyaya.

'Anvṛtti' means the repeated presence/general recurrence of any quality, characteristic, or meaning across multiple objects. Depending on context, it has two main uses—in philosophical theory (Nyaya/Mimamsa) and in grammar (Paninian sutra system).

Firstly, in philosophy anvṛtti denotes the recurrent presence of common properties—qualities that exist uniformly in many entities. For instance, "cowness" is anvṛtta in all cows; "potness" is anvṛtta in all pots; "blueness" is anvṛtta in all blue objects. Here the opposite concept of "anvṛtti" is "vyāvṛtti" (also used as "vyābṛtti/vaibṛtti")—which creates exclusion/differentiation from others. That is, universals (sāmānya) are identified through anvṛtti; particulars are identified through vyāvṛtti.

In Nyaya, "universal" (sāmānya) means anvṛtti-natured entity—what is common among many. "Particular" (vishesha-natured entity) means vyāvṛtti-natured entity—what differentiates each from others. "Anvṛtti" creates generic unity; "vyāvṛtti" creates individual difference.

Cowness is anvṛtta in all cows, but the qualities that create difference between "cow" and "horse"—like horns, body structure, sound—these are vyāvṛtti.
Potness is anvṛtta in all pots, but each pot's color, shape, location etc. that distinguish it from other pots—these are vyāvṛtti.
Among the human species, characteristics that distinguish humans from other animals—intelligence, language, ethics—these too are manifestations of vyāvṛtti.

Secondly, in Nyayic inference, to establish "vyāpti" (pervasion), we actually observe—wherever the reason (hetu) exists, there the probandum (sādhya) also exists; this consistent observation of "being together" can be called the presence of reason with anvṛtti of the probandum quality. Again, where the reason is absent, there the probandum is also absent—this is the aspect of vyatireka/vyāvṛtti. Thus through observation of anvaya-vyatireka, we strengthen the 'reason-probandum relation'; in this context, the word "anvṛtti" is used to indicate consistent repetition of co-presence.

In grammar, "anvṛtti" means some word or condition from a previous sutra "carrying over" to subsequent sutras due to sandhi/abbreviation—that is, the meaning or instruction of an earlier rule applies tacitly to later rules as well. This is a technical device of the Paninian sutra system, keeping language concise while maintaining applicability.

Understanding through example becomes easier: "Cowness" is anvṛtta in all cows—therefore cows can be called one "species"; but that "cowness" is absent in horses—here there is vyāvṛtti or difference between horses and cows. Again in inference, wherever smoke is seen, fire is also seen there—from the anvṛtti of co-presence of smoke with fire we establish the pervasion "smoke—fire"; where there is no smoke, there is generally no fire either—this is the aspect of vyatireka.

In summary, anvṛtti is the recurrent presence of common properties across multiple substrata (in philosophy), and the continuation of elements from previous sutras into later ones (in grammar). In philosophical discussion, it is generally connected with analysis of universals/pervasion/anvaya; in grammar, it is a method of abbreviating sutra-application.

Navya-Nyaya refines this discussion by saying—in certain situations, absence can also be taken as perceptual knowledge; they call this "absence-perception" (abhāva-pratyakṣa). However, they do not make this a separate new means of knowledge; this is a special form of perception itself—sensory contact occurs with "absence-inherent-in-substratum" (for instance, the table is now pot-empty—this itself is grasped in perceptual knowledge).

According to Bhatta-Mimamsa and Advaita philosophy, "non-apprehension" is an independent means of knowledge—that is, it does not fall under any other means of knowledge (like perception or inference), but is itself a new path of knowledge. They say we often know directly from "not-finding" or "not-seeing" an object that it is absent; this knowledge is not an intermediate inference but direct absence-knowledge.

As an example, suppose you are looking in a well-lit room and see there is no pitcher on the table. You are not making any inference here—"if there were a pitcher it would be seen, it is not seen, therefore it is absent"—this analysis does not come to your mind separately; rather you know it directly in one moment. This "direct knowing of absence"—this is knowledge arising from non-apprehension.

This directness is the core of their argument. They say if we call "not-finding" merely inference, then countless everyday experiences of ours would become difficult to explain. Because we constantly gain knowledge this way—"there is no pen here," "no person in the room," "no sun in the sky"—these are understood instantly, not through reasoning or inference. Therefore, to explain this kind of knowledge, "non-apprehension" must be accepted as a separate means of knowledge.

For this means of knowledge to be effective, certain conditions are needed—firstly, what we seek should be perceivable by the senses if present in that state; secondly, senses and light are fine, there is no obstruction, attention is also there. When all these conditions are fulfilled, from "not-finding" comes the knowledge "absent." That is, if an object were present it would necessarily be apparent—but it is not apparent—this is the knowledge of absence.

For this reason, Bhatta-Mimamsa and Advaita say "non-apprehension" is not merely inference; it is an independent means of absence-knowledge, where not-finding or not-seeing directly creates consciousness of "absence."

The conditions needed for non-apprehension to be effective—(a) sensory means are fine, (b) light/distance/obstruction etc. are suitable, (c) attention is there, (d) the object we seek should be sense-perceptible in that state. When all these exist, 'not-finding' means 'absent'—this is knowledge arising from non-apprehension.

Vyāpaka and vyāpya—these two concepts are extremely important in the inference-means of Nyaya philosophy.

Vyāpaka means that property or object which everywhere covers or includes another. This is the broader entity. Vyāpya means that property or object which always remains within that vyāpaka, never seen outside it. This is the smaller or dependent entity.

In inference or reasoning, when we say "where there is smoke, there is fire," fire is the vyāpaka, because fire everywhere contains smoke. Smoke is vyāpya, because smoke always depends on fire; generally no smoke occurs without fire.

Put differently, where vyāpya exists, vyāpaka must exist; but vyāpaka can exist without vyāpya too. For instance, fire can exist without smoke (like a hot dry iron plate). Therefore fire is vyāpaka, smoke is vyāpya.

This relationship is the basis of inference—called "vyāpti-relation." This is such an inseparable connection where the presence of one ensures the presence of the other.

For example—where there is water, there can be vapor. Here water is vyāpaka, and vapor is vyāpya, because vapor is always dependent on the existence of water.

Vyāpaka is the broader or covering truth; vyāpya is its contained dependent form. In inference, when we reach conclusions by the rule "where vyāpya exists, vyāpaka exists," only then can we confidently infer the existence of one thing from another.