Person A gives a loan to person B.
Person B gives a loan to person C.
Person C scams person B and doesn't pay the loan back.
Person B tells person A he won't pay back to person A because person C didn't pay person B back.
Is that how you do things in real life?
Nope, person B still has to pay back to person A even when person C scammed person B. If he doesn't person B is a scammer too.
No. I already paid "person A" with BTC on Ripple. I've clearly advertised my threads as Ripple Bitcoins, Bitcoins on Ripple, etc.
They are debt, but they have no terms and cannot be redeemed. They're also sent for free.
This is equivalent to selling something like.. Pirate BTC and the buyer complaining when they can't redeem.