Lal, you say:
One type of dukkha-dukkha (physical suffering) is vipaka.
– The other type of mental suffering, “domanassa vedana,” may arise due to the above vipaka vedana. That is absent in an Arahant, even though the first would still be there.
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If sankhara dukkha arise later as vipaka, then those will be dukkha dukkha, right? Same for viparinama dukkha; it comes in as vipaka vinnana and would generate domanassa vedana. That means all would be dukkha dukkha. How to distinguish?