Consequently, no independent or autonomous distinction can be established between knowledge and the object of knowledge. The fundamental purpose of Advaita Vedanta is precisely this—to demonstrate that the notion of duality (a fundamental difference between knowledge and the knowable object) cannot withstand logical scrutiny. All apparent differences are merely veils of maya, and ultimately only the non-dual Brahman is the absolute truth. The identity of knowledge and the knowable object is the ultimate reality.
The necessity of a second knowledge to establish difference: Let us suppose, for argument’s sake, that a second knowledge is required to know a first knowledge. In this situation, one could argue that the difference between a pot and knowledge of the pot is revealed by this second knowledge. Now, this crucial question arises: To know this ‘difference,’ must its counter-entity (pratiyogi) and its locus (anuyogi) be known beforehand? Counter-entity: Knowledge of the pot (perception of the pot). Locus: The pot itself.
First alternative: No prior knowledge of counter-entity and locus is needed—If you claim that no prior knowledge of the counter-entity and locus is necessary, then a significant difficulty emerges. One never gains knowledge of a difference that has no basis (locus) or counter-entity. Our consciousness is always in the form “this is different from that.” Therefore, knowledge of difference always presupposes a locus and a counter-entity.
Second alternative: Prior knowledge of counter-entity and locus is essential—If you then insist that prior knowledge of the counter-entity and locus is indeed essential, this leads to an infinite regress (regressus ad infinitum). Why? Because: The second knowledge would reveal the first knowledge. A third knowledge would be needed to reveal the second knowledge. A fourth knowledge would be needed to reveal the third knowledge—and thus one becomes trapped in an endless chain.
Third alternative: Knowing difference within the same second knowledge—If you propose that “knowledge of difference occurred within this same second knowledge,” then this presents the fallacy of self-dependence (ātmāśraya doṣa). In this situation, the second knowledge is functioning simultaneously as both cause and effect. It claims that the difference it is revealing was already present as its own cause.
Therefore, direct knowledge, merely by asserting “existence is,” can never provide evidence for difference—that object and knowledge of object are separate. Simply put, if you claim, “The pot and knowledge of the pot are separate, and this difference is perceived by a second knowledge,” then you inevitably fall into either infinite regress or the fallacy of self-dependence. Consequently, dualism cannot be proven; rather, the non-dualist position (advaita) is what withstands logical examination.
The dualists’ presumptive argument and the non-dualists’ refutation: The relationship between knowledge and the knowable object
1. The dualist’s presumptive argument: Dualists firmly claim that the knowable object (such as a pot) and our knowledge about that object (such as pot-knowledge) are separate from each other. As the reason for this difference, they say that within the object exist certain qualities or attributes that are completely opposite to the attributes of our knowledge about that object. For example, a pot has specific shape, weight, color, and occupies space. These are physical characteristics. But ‘pot-knowledge’ (the concept of the pot in the mind) does not possess such physical characteristics; it is a mental process, abstract.
Dualists use an analogy to further clarify this argument: Just as cloth and pot are two completely different objects because their attributes are entirely different from each other. A cloth’s attributes (such as soft, elastic, wearable) do not match those of a pot (such as hard, brittle, capable of holding). Similarly, according to them, the phenomenon of the pot itself (i.e., the pot’s existence) is as distinct and different as the phenomenon of cloth. Therefore, their ultimate conclusion is that the pot must be different from ‘pot-knowledge.’ That is, object and knowledge of object are two different entities.
2. The non-dualist’s refutation: Non-dualists consider this presumptive argument of the dualists to be baseless and flawed. Their main objection is that the ‘opposition of attributes’ upon which dualists want to prove the difference between knowledge and the knowable object—to know this opposition, the fundamental difference between knowledge and the knowable object must first be known.
Circular reasoning and lack of proof: According to non-dualists, if the difference between knowledge of object and object is not proven first, then one cannot claim that there is opposition between their attributes. This is a kind of circular reasoning or ‘petitio principii’ (begging the question). If you say that ‘A’ and ‘B’ are different because their attributes are different, then you are already assuming that ‘A’ and ‘B’ are different. But this fundamental difference is precisely what needs to be proven.
Incompleteness of the universal rule: The ‘universal premise’ that dualists are using—”opposition of attributes always indicates difference”—this rule itself is questionable to non-dualists. This rule can only be established when we can prove both difference and attribute-opposition in countless examples. But dualists fail to prove the establishment of this rule in their argument. Though the difference in their example of cloth and pot appears self-evident, non-dualists challenge even this self-evidence.
Limitations of direct knowledge: Non-dualists say that even the difference between cloth and pot cannot actually be established on any ultimate proof. To prove this difference also requires direct perception. That is, we understand through seeing with our eyes or touching with our hands that cloth and pot are separate. But is this direct knowledge itself the ultimate truth? If you say difference is not proven by direct perception, then attempting to prove it with secondary inference will result in infinite regress or logical see-saw.
Infinite Regress: This means that in trying to prove one matter, another matter needs to be proven, and to prove that second matter a third is needed, and thus it continues infinitely. For example, to prove ‘A’ requires ‘B’, to prove ‘B’ requires ‘C’, and thus it continues endlessly, with no conclusion. As a result, the original matter is never proven.
Logical See-Saw: This means depending on one concept to prove another, and depending on the first to prove the other. This is a condition where no single concept can be established firmly or independently.
The non-dualists’ conclusion: Therefore, according to non-dualists, dualists can never prove through their presumptive argument that object (such as pot) and knowledge of object (pot-knowledge) are two different entities. Just as direct knowledge cannot ultimately show this difference, neither can inference. In simple terms, the cloth-pot example that dualists are using to prove ‘difference’ is actually circular reasoning. They want to prove difference by depending on something that itself awaits proof of difference. That is, their argument is not self-established, but rather trapped in a kind of fallacy. Non-dualists here want to show that establishing difference between knowledge and the knowable object is difficult in a way that does not make knowledge itself the basis for perceiving that difference.
The fundamental basis of Vedanta philosophy is non-dualism—the doctrine that Brahman alone is the ultimate truth and the world is non-different from Brahman. Based on this concept, an important question arises: If the ultimate teaching of the Vedas is non-difference or non-duality, then how can the Vedas present the world as different from or dual to Brahman?
The Vedas, especially the Upanishad portions, guide toward Brahma-knowledge and liberation. The essence of these teachings is: “Ekam evādvitīyam” (He is one without a second), “Neha nānāsti kiñcana” (Here there is no multiplicity whatsoever), and “Sarvaṃ khalvidaṃ brahma” (All this is indeed Brahman). These great statements clearly declare that Brahman alone is the real entity and the world is not separate from it. If the Vedas’ primary purpose is to impart non-dual knowledge, then it is impossible that the Vedas would simultaneously teach difference or duality, that is, propagate any notion that the world is real and different from Brahman. For if this were so, then contradiction would appear in the Vedas’ statements, which is unacceptable for any authoritative scripture.
Objection: Creation-related Vedic statements and the concept of duality—However, an important objection arises when we examine the creation-related statements of the Vedas. For example, when the Vedas say, “The world originates from Brahman,” it might naturally seem that the created world is different from Brahman. If the world were indeed non-different from Brahman, then there would be no meaningfulness in using the word “origin.” The concept of origin indicates a cause-effect relationship, where the effect (world) is considered separate from the cause (Brahman). From this perspective, it appears that the Vedas themselves are acknowledging duality.
Vedanta’s response: The true purpose of creation-statements—In response to this objection, Vedanta philosophy presents a profound analysis. Its main argument is: The purpose of creation-related Vedic statements is not to prove the world as different from Brahman, but rather to deny other philosophical doctrines, such as the ‘pradhāna’ or ‘prakṛti’ of Sāṅkhya philosophy as the cause of the world. Sāṅkhya philosophy considers the world to have originated from an independent and inert element called prakṛti. Vedanta wants to refute this doctrine and prove that Brahman alone is the cause of the world.
This can be understood through an illustration: Just as no real difference can be specifically stated between clay and pot (cause and effect). The pot is said to be a particular form or modification of clay, not an entirely different entity from clay. Similarly, no real difference can be specified between Brahman (cause) and its effect (world). The world is merely a manifestation or name-and-form of Brahman, not a completely separate real entity from Brahman. Therefore, the true purpose of creation-related Vedic statements is only to create the understanding that Brahman alone is truth, there is nothing second. These statements are essentially a means of further strengthening non-dual knowledge.
The importance of negative statements and inference versus śruti: If we assume that the Vedas are teaching difference, then the negative statements present in the Vedas, such as “There is no difference in Brahman” (neha nānāsti kiñcana), “neti neti” (not this, not that)—these would have no meaning whatsoever. These negative statements establish Brahman’s nirguṇa, formless, and non-different being. If creation-statements proved difference, then these negative statements would become meaningless, which is contrary to the Vedas’ internal consistency.