Tibetan pramāṇa theory treats skepticism not as an enemy to be crushed, but as a mental state to be clarified, refined, and ultimately transformed. Doubt is carefully classified, distinguishing mere uncertainty from more developed forms of doubt, including those that lean toward error, those that balance possibilities equally, and those that lean toward the correct side. This last type is valued as “investigative doubt,” a starting point for inquiry rather than a dead end. In this way, skepticism is not simply dismissed; it is given a place within the path as a provisional but workable state of mind that can be guided toward certainty.

The response to skepticism is anchored in a precise account of valid cognition. Tibetan epistemology recognizes two primary pramāṇas: direct perception, which is non-conceptual and free from error, and inference, which arises from a correct reason that satisfies strict logical criteria. These criteria require that the reason be present in the subject, pervaded by the predicate, and not contradicted by counter-instances, thereby setting a high bar for what counts as knowledge. Once such a valid cognition is established, persistent refusal to accept its conclusion is treated as a fault in reasoning rather than as a legitimate expression of doubt.

Debate training serves as a living laboratory for working with skepticism. Through formal dialectical exchange, hidden assumptions are exposed, fallacies are identified, and positions are tested by consequence-based arguments that reveal self-contradictions. Radical skepticism, which denies the possibility of any reliable cognition, is challenged by showing that such a stance undermines its own claim and cannot be maintained in practice. Everyday functioning, ethical commitment, and even the act of arguing presuppose trust in perception and inference, so the training uses this fact to turn skepticism back upon itself.

All of this unfolds within the broader framework of the two truths. On the conventional level, perception and inference are affirmed as reliable guides for navigating the world, grounding ethics and practice without collapsing into naïve credulity. On the ultimate level, reasoning is used to dismantle reified views and clear away mistaken conceptions, preparing the mind for a non-conceptual realization of emptiness that lies beyond discursive doubt. In this way, Tibetan logic cultivates a disciplined, discriminating attitude: skeptical enough to avoid error, yet confident enough in valid cognition to avoid the paralysis of global doubt.