The iterated “but how do you know that” also works as a FGC, or gets your opponent to admit he is relying on an unjustified assumption.
This is a good one. More generally, it’s sometimes called the “Why” Regress. Not just about how you know something, but about how something happened or came to be. It applies equally to science and religion.
Edit: ”...know you know” ⇒ ”...how you know”
The iterated “but how do you know that” also works as a FGC, or gets your opponent to admit he is relying on an unjustified assumption.
This is a good one. More generally, it’s sometimes called the “Why” Regress. Not just about how you know something, but about how something happened or came to be. It applies equally to science and religion.
Edit: ”...know you know” ⇒ ”...how you know”