Open Thread - The Roman Catholic Magisterium

I've opened up this thread so that all interested might discuss matters begun over at GreenBaggins.

Questions on the table:

(1) Is the vow given in the rite of initiation into the Catholic Church a formal fallacy? I affirm.

(2) Is sola scriptura distinguishable from solo scriptura? I affirm.

(3) Is the Protestant secretly relying on his own opinions rather than on Scripture? I deny.

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