Ashthang Nimitt Gnyan (Ashtanga Nimitta Jnana) is a category of knowledge in Jainism where the soul understands events or future signs by interpreting nimitta (omens or signs) that appear in the external world. It is considered a form of indirect or sign-based knowledge, not direct perception, and its reliability depends on correct interpretation.

Key points:

• It is typically described as “nimitta” knowledge, arising from signs observed in the environment, rather than from direct sensory perception (matti/jnana) or higher, self-realized wisdom.
• The term "Ashthang" (eightfold) indicates it is discussed within a framework that groups nimitta-based insights among other eightfold or composed categories of knowledge in some Jain literature.
• There are differences between Digambar and Shwetambar traditions on the exact status, extent, and interpretation of nimitta-based knowledge. Some texts treat it as a lesser, mundane form of knowledge, while others discuss its role more affirmatively within a practitioner’s path.
• In practice, nimitta-based knowledge is approached with caution in Jain sadhana, emphasizing that such signs are not infallible and should not substitute for proper ethical conduct, right faith, and disciplined practice.

If you’d like, I can share more precise explanations of the differences between Digambar and Shwetambar interpretations or provide canonical verses (in transliteration) and their meanings from Jain scriptures.