> I think banks and customers would disagree rather violently regarding the (distributed, asynchronous) system that handles credit card transactions. Do they?

> I think banks and customers would disagree rather violently regarding the (distributed, asynchronous) system that handles credit card transactions. Do they? Most customers accept without question the idea that they have an "available" balance distinct from their "current" balance. It's also the case that when attacked the system typically fails and then the fungibility of currency combined with the massive power of insurance is used to pave over it.