Muharram 6, 1330
The three righteous caliphs, may Allah be pleased with them, are, indeed, the subject of the study and debate; to use such caliphate, however, to rebut our arguments is totally rejected.
1) To believe in those caliphs, as well as in those who swore allegiance to them, does not require interpreting the arguments. In justifying their caliphate, you yourselves resort to interpretation, as we will clarify if necessary.
2) Interpreting the texts which we have stated to you is impossible; so is the case with what we have not stated yet, such as the Ghadir's hadith and that of the Will, particularly when backed by irrefutable traditions which support one another, the latter being sufficient by themselves to require reference to manifest texts. Whoever acquaints himself with the latter will find them irrefutable testimonials and unequivocable verdicts, Wassalam.