According to whose authority? Why do you say that?
By whose authority did you use to say it was an excellent article?
What is your basis for assurance of Truth? Is it on the basis of the weight of Scriptural substantiation or the premise of the ensured magisterial veracity of Rome?
It seems that the RC argument is that an assuredly (if conditionally) infallible magisterium is essential for determination and assurance of Truth (including writings and men being of God) and to fulfill promises of Divine presence, providence of Truth, and preservation of faith, and authority. (Jn. 14:16,26; 15:26; 16:13; Mt. 16:18; Lk. 10:16)
And that being the historical instruments and stewards of Divine revelation (oral and written) means that such is that assuredly infallible magisterium. Thus any who knowingly dissent from the latter must be in rebellion to God. Does this fairly represent what you hold to or in what way does it differ?