Funny, nobody answers the question I asked about what non-Catholic group has the fullness of truth. Every group, RCC or otherwise, has the Masoretic Hebrew and Received Texts, which contain aall the Truth God has revealed to the human race. It's what they do with it that counts.
The problem is, that with everyone having the Masoretic Hebrew and Koine Greek Texts, the only way the RCC has to achieve product differentiation is to assert that their uninspired Catechism supersedes the truth and authority of the verbally and plenarily inspired, infallible, inerrant, preserved Holy Scriptures, and hence has
better truth.
Hmmm.