And yet you can't get them to read a theological study on the doctrine of necessity (yourself included), much less offer a refutation of it.
Most serious sedes - as well as conciliarists like myself- have read these studies. Neither group is that convinced it has anything much to do with an alleged state of sedevacantism, sedeprivationism or sede-agnosticism (I believe some on CI refer to this last theory as sede-doubtism). So in terms of the R&R vs sede debate, it is pretty much considered a red herring.
Where the doctrine of necessity is relevant is in the debate between R&R and conciliarist trads. That is, you guys claim the doctrine of necessity justified the 1988 episcopal consecrations, your own annulment tribunals, etc. We claim it does not, and that the SSPX and other R&R are obligated to seek a reconciliation with Pope Francis like the FSSP, Le Barroux, Campos, etc...
They know what happens to their theory once they expose their minds to it, and they wont allow that to happen.
Sean, not being a sede myself, why would I waste my time offering a sede refutation of what I believe to be a R&R red herring in their battle with sedes?
That being said, I am surprised no sede on CI has pointed out that arguments based upon the doctrine of necessity actually favour the sede position over the R&R one. That is, necessity usually applies when one is physically or morally impeded from accessing the mind of the legislator. But in this case R&R have access to and know the mind of the legislator, and choose to act against it.
In contrast, sedes would have a much stronger claim since sedes either have serious doubts or do not believe he is the true legislator, and there is no foreseeable short-term resolution to the problem.
But again, that's an argument against the R&R position that is up to sedes to flesh out.