Lal – thank you very much for the Tapussa Sutta rendering – without your explanation the Sutta would seem to be somehow confusing. Only the last line in your comment to the Sutta made me careful: “…It is also clear that a paññāvimutti Arahant cannot get to the saññā vedayita nirodha state during his/her lifetime.” In Burmese Mahasi Meditation Centre the successful yogis are led into gradually extended “phala-sammāpatti” – up to 2 hours. I would take the Mahasi style of meditation practice as a nowadays way to paññāvimutti realization (- though Ven. Mahasi would recommend his instruction for first and second degree of realization. For anāgāmī realization, it is believed in Myanmar, that jhanas are indispensable). Phala-sammāpatti I understand as saññā vedayita nirodha. For my understanding, Magga and phala itself (and the phala-sammāpatti even more) is a special kind of jhanic experience. So even the paññāvimutti Arahat must have at least some jhanic moments. Please comment on that.
Another point: do you think that every ubhatobhāga-vimutta must be (beside paññāvimutta) also akuppā cetovimutta?