1. Retention of apostolic succession, indefectibility, and visibility.
2. A realistic view of how a future valid Pope, and Bishop of the Roman See, may be had and relatively universally accepted.
3. An avoidance of Conclavism, mystical apocalypticism, and panoptic sectarianism.
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Thank you for putting it so succinctly!
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I am a sedevacantist, but I do not hold Guerard des Lauriers's position. My reasons are that I find it somewhat over thought and slightly novel as a result, but even if not for that I have never found it to hold any implications that cannot be arrived at through more conventional and surer theological principles.
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As to 1, I think these features of the Church can and are retained with 'simple' sedevacantism, so long as one avoids arguing that ordinary jurisdiction has terminated. As to 3, I am very keen to see those errors avoided-- although thesis holders in general do seem to be some of the most idiosyncratic traditionalists--no offense, I'm only saying that I've not seen any proof in reality that the thesis makes for stable piety.
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To me, it would seem that the second implication is the truest implication, and the one implication the thesis has that simple sedevacantism does not. The thesis provides a relatively specific 'way out' whilst simple sedevacantism, though free to provide a variety of possible ways forward, does not render clear which of those ways are veritable.
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Thanks, and God bless.