Just a quick note here – the article states:
"In Christianity, the Church Fathers translated their assurance that the believers are guided by the “Spirit of Truth” ... into a conviction that the body of believers collectively could not agree on an error : “Ecclesia generalis non potest errare” in the much later formulation of Thomas Aquinas (Summa. Th. Suppl. 25.1)"
I rather think you misunderstand here – The phrase 'Ecclesia generalis' literally translates to 'the general Church', but in every translation of the ST III Sup. Q25 A1 the wording: "Praeterea, Ecclesia generalis non potest errare..." in its English translation reads: "Further, The universal Church cannot err... " and in the parlance of the Catholic Church, the phrase 'universal Church' refers to a greater context than the lay community.
Furthermore:
Although the Christians knew from the Gospels that the disciples had disputes among themselves, which Jesus resolved, they believed that the disciples, and the believers everywhere and of every age, would never agree on an error. (Quod ubique, quod semper, quod ab omnibus creditum est, in the words of Vincentius de Lérin)
Clearly this is not the case, as the history of heresy and dispute testifies. Anyone with a passing knowledge of history knows no Christian in
their right mind would believe this.
The phrase is: Magnopere curandum est ut id teneatur quod ubique, quod semper, quod ab omnibus creditum est" – "Great care must be taken to maintain that which is everywhere, which is always, which is believed by all" – by which he meant the faith of the Church as professed in the Creed and that 'which is believed by all' in union with their presbyters and bishops.
(Aside:
When the authorities of the Emperor in Constantinople kidnapped St Martin I and St Maximus the Confessor, they tried to convince the latter that the Pope, and therefore the Church, believed in a doctrine that refuted Maxiumus' teaching. The venerable old monk (then in his 80s or thereabouts) replied, "Then they are wrong, and I am the Church!")
Sadly, St Vincent himself was not infallible, as he is regarded as a semipalagian, later defined as a heresy
Nevertheless, it became a Roman Catholic doctrine that the consensus fidelium – what is stated with the agreement of all believers – cannot err.
LOL, no doubt the magisterium of the Church and myself are in accord when we say we wish that were true – But if you can show me a theology of the Church that enjoys 'the agreement of all believers' and arose from consensus, I'd be astounded, because I've never come across one.
The 'consensus fidelium' denotes a supernatural sign in the Church which transcends theologies ... dare I say it, doctrines and dogmas also.