“I have checked again Erasmus’ words quoted by Erika Rummel and her comments on them in her book Erasmus’ Annotations. This is what Erasmus writes [on] in his Liber tertius quo respondet … Ed. Lei: Erasmus first records that Lee had reproached him with neglect of the MSS. of 1 John because Erasmus (according to Lee) had consulted only one MS. Erasmus replies that he had certainly not used only one ms., but many copies, first in England, then in Brabant, and finally at Basle. He cannot accept, therefore, Lee’s reproach of negligence and impiety. ‘Is it negligence and impiety, if I did not consult manuscripts which were simply not within my reach? I have at least assembled whatever I could assemble. Let Lee produce a Greek MS. which contains what my edition does not contain and let him show that that manuscript was within my reach. Only then can he reproach me with negligence in sacred matters.’
“From this passage you can see that Erasmus does not challenge Lee to produce a manuscript etc. What Erasmus argues is that Lee may only reproach Erasmus with negligence of MSS if he demonstrates that Erasmus could have consulted any MS. in which the Comma Johanneum figured. Erasmus does not at all ask for a MS. containing the Comma Johanneum. He denies Lee the right to call him negligent and impious if the latter does not prove that Erasmus neglected a manuscript to which he had access.
“In short, Rummel’s interpretation is simply wrong. The passage she quotes has nothing to do with a challenge. Also, she cuts the quotation short, so that the real sense of the passage becomes unrecognizable. She is absolutely not justified in speaking of a challenge in this case or in the case of any other passage on the subject” (de Jonge, cited from A History of the Debate over 1 John 5:7,8, Michael Maynard, p. 383).