Manah jñānam (manah jinānam) means “mental knowledge” or “knowledge of the mind.” In Jain philosophy it refers to cognition that occurs in the mind (manas)—knowledge gained through internal processes such as reflection or inference—not directly seen (dṛṣṭa) or heard (śruta).

Key points:

• It is a form of jñāna (knowledge) but considered more internal and less reliable than direct perception (dṛṣṭa) or scriptural knowledge (śruta).
• It often involves mental inferences or contemplations about phenomena, and is discussed in Jain epistemology as part of the spectrum of valid knowledge (jñāna).
• There are differences in emphasis between Digambara and Śvetāmbara traditions on how “manah jñāna” is defined, its scope, and its reliability within the overall framework of right knowledge.

If you’d like, I can share the exact verses or glosses in Jain scriptures that discuss “manah jñāna” and how each tradition explains it. You can read more on related topics here