If he sufficed with these words...
If he sufficed with these words, it would be able to say that with knowledge he intended to mean strong conjecture, whereat disagreement between him and them could be so intense, but he went farther by describing the ilm to be yaqini (certain), leaving thus no room for compromise with them. It is quite known that to contradict `ulama of kalam and usul was not an easy job.
The point worth mentioning here is that some of the researchers were of the opinion that akhbar al-ahad may indicate knowledge — with the contexts — differing in regard of whether the contexts signifying the report (khabar) being true or not. Al-Nazzam and Imam al-Haramayn and al-Ghazzali believed in their denoting knowledge while others denied this. 520 Hadith Including no Mutawatir:…