assertor

One who asserts or avers.

[N]o waver in Judgment, have I, though Gods mercy, ever been; but a conſtant aſſertor of, and ſufferer for my ſatisfiedneſs in, and adheſion to, the piety and probity of my breeding and belief, vvhich vvas ever, yet is, and I hope, through Gods grace, to death ſhall be, in point of Religion according to the Doctrine and Diſcipline of the Church of England.

2017 Mario von der Ruhr, et al: Religion and Wittgenstein's Legacy; →ISBN When Wittgenstein says that he cannot contradict the assertor of a Last Judgement, he uses (repeatedly) the first person singular. There is no argument that the impossibility of his contradicting the man is a result of his not himself being a religious man, or not being a participant in any religious life, the result, that is, of some condition such that, if anyone were in that condition, he also would not be able to contradict the assertor. He mentions the case of an atheist who does contradict the assertor, and asks whether the atheist means the same by a Last Judgement as does the assertor, but replies that the criterion for meaning the same isn't clear.

One who supports, affirms, defends, or vindicates; a champion.

[I]t is a deed of higheſt charitie to help undeceive the people, and a vvork vvorthieſt your autoritie, in all things els authors, aſſertors and novv recoverers of our libertie, to deliver us, the only people of all Proteſtants left ſtill undeliverd, from the oppreſſions of a Simonious decimating clergie; […]