Ontological status: Both the shell (present) and the silver (remembered) are REAL external objects, but their relationship in perception is wrong.
1. Direct contact occurs with the shell, but due to poor light or defect (Dosha), its distinguishing feature (nacreous quality) is missed, and its glitter is noted. 2. The glitter triggers past memory of real silver seen elsewhere (e.g., in a market). 3. Through an extraordinary sensory contact (Jñānalakṣaṇa Sannikarṣa), past memory projects real external silver onto the present shell, creating an 'otherwise' perception.
Example: Rope-Snake / Shell-Silver: Real silver seen in the past is falsely projected onto a real shell present in the room.
Correction happens when closer inspection reveals the true substrate ('This is a shell, not silver'). The false relationship dissolves, but both shell and silver remain real independent entities in the world.
To defend Direct Realism and Substance Dualism: proving that human errors are misattributions of real things, rather than evidence that the external world is subjective or illusory.