Sedevacantism is only a theological speculation that can easily degrade into schism for the one who holds it, if not prudent precautions are taken. There are many theological flaws in the sedevacantist thesis. Most sedevacantists are not even able to give a clear and irrefutable theological reason as to why an elected Pope can certainly never be a heretic, and why no Pope can ever fall into heresy. The final argument is that it is a matter of "Divine Law" (not ecclesiastical law, however they keep bringing up and misusing cannon laws in order to push their agenda), as if the common layman could have a final say in the matter.