Thesis Dharmottara’s mirage is not really a Gettier case, and calling it one flattens both traditions
Where it stands
Every year someone on a comparative course says "the Buddhists found the Gettier problem a thousand years early", and every year I nod and feel uneasy. Let me try to say why, and you can tell me where it breaks.
The case: a traveller sees what looks like water shimmering ahead, believes there is water, and there is water, at a slightly different spot, hidden, while what he actually saw was a mirage. Dharmottara, an eighth-century commentator on Dharmakīrti, uses it while explaining what counts as a valid cognition. Structurally it is a perfect Gettier case: a belief formed in a normally good way, true, and true by accident.
But look at what the example is for. Dharmottara is not testing a definition of knowledge as justified true belief. He is working inside a theory in which a pramāṇa, a means of valid cognition, is by definition non-deceptive. A cognition that only happens to land on the truth is not a weakly justified pramāṇa; it is not a pramāṇa at all. Truth is built into the status from the start.
Gettier's cases need the opposite assumption: that you can be fully justified and still wrong, so that justification and truth are independent and can come apart. Remove that independence and the "problem" cannot even be set up.
So my thesis: the mirage and the ten coins look identical but do different jobs. One illustrates a definition; the other refutes one. Treating them as the same discovery makes the Indian theory look like an early draft of analytic epistemology, and makes Gettier look like a rediscovery of something the Buddhists had already solved. Neither is quite true.
Objections welcome. I am arguing this more firmly than I believe it.