[Petronski]

Therefore, that someone must have the ability to know the requirements. If works are required for salvation (as opposed to evidence thereof), then this assurance is impossible because he cannot know the amount and quality of works prior to death.

That is circular logic of the highest order.

Similarly, if the girl weighs less than a duck, she can't float and therefore is made of flammable wood, proving she's a witch.

[Petronski]

Wait...if the girl weighs less than a duck, that means she CAN float and therefore is made of flammable wood, proving she’s a witch.

[esquirette]

“That is circular logic of the highest order.

Similarly, if the girl weighs less than a duck, she can’t float and therefore is made of flammable wood, proving she’s a witch.”

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There is no premise so that sentence is not circular logic. That sentence is nonsense.

Circular logic is more along the lines of this statement:

The Church is infallible because the Scripture says so, and the proof of the Scripture being correct is that the Church is the final interpreter thereof.