None? A lot? The concept of debt is confusing to me because there’s a moral way to look at it and a legal way. Have I ever asked for a loan or favor I later didn’t pay for? No, I owe nobody anything. But legally, you have economic principles, like unnecessary medical expenses or ones which you didn’t know an action of your were accumulate, which are only debts in the sense that the law says so. I owe medical providers something like a few thousand dollars (which my legally recognized debt can be rounded down to) for things like this and this, and an online course I take decided to say I owe them without telling me, though they haven’t dropped me (yet).