If I thought further castigation of your pigheadedness might serve some purpose, I would continue.
I shall take your post (Kp) to mean that you do in fact understand that he thought such a course was possible and justifiable. You seem to have a hard time with yes/no. Even in conceding ground, you do so in a manner that is altogether contrary to manly, rational behavior.
As for you, my dearest Joan...although you seem no more capable of a rational discourse about a specific point than Kp, I shall ask you the same question:
Did Abp. Lefebvre admit that sedevacantism might become the correct course of action, thus demonstrating that he himself thought it was, given certain circuмstances, a legitimate line of action? This is a YES or NO question, dear. All other "insightful" comments that fail to provide a simple answer to the question shall be received as what they are: the evasion of a proud mind that does not possess the critical thinking skills to even speak about these matters in such a way that is remotely profitable to anyone.
Btw, no one has ANY DOUBTS about Abp. Lefebvre's having never believed that sedevacantism was, in fact, the correct response. This is PLAIN and CONCEDED. Try to focus on the actual point under discussion. Such a practice might help matters immensely.