Good question. Technically no. The fiat (government or entity issuing currency) is guaranteeing the currency. And it is the faith in that guarantee which gives the money value. The issuer (government) assumes that debt which if all goes well is nothing more than a promise they never pay.

Yes, in theory. As long as someone does not get something on credit, there is no debt. In practice, that would not really happen.

Life is debt everyone has bills so therefore debt cannot be avoided.

sure