Am I correct in reading this that you don't have a problem with 'someone' declaring things infallible, but only on what basis it is done so?
Not in principal to the first part, the second part determining if there is a problem.
If so, who would be acceptable to you and on what basis? Notice, I assume there must always be a 'who.' I think that is true infallibly. :)
If any atheist tells me that it is sunny day here, and the sun is shining, then i would consider that a a surely true, and thus infallible statement.
Likewise a pagan who affirms their is a Creator. Scripture affirms man can make correct judgments, even about the weather, (LK. 12:54) and affirms the use of reason as arriving at assured truth in the light of evidence. (1Kg. 17:24; Jn. 6:69)
But it nowhere affirms formulaic assured infallibility as per Rome.
Now once again i will ask,
Is your argument that an assuredly infallible magisterium is essential for determination and assurance of Truth? (Or what>)
Well, that's the way Christ set it up of course :) But...
Logically, the alternative is A) Some other person on entity. And then you have the problem of whom/what. Or you have B) A bunch of competing "Truth."
So, in practice, sola scriptura does not work. Unless you have another alternative?
I cry....
Mentioned; but not pinged...
Numbers 22:28