If this is a way to avoid financial crises, then we can prevent anything bad from ever happening by clearly defining "bad things" as "things that cannot happen."
The example given is explicitly labeling certain debt as "not expected to be paid back if there are troubles", so that someone who buys that knowingly accepts the risk. That's more substantive than just defining it away, although the catchy way in which it's worded might not give that away.
Another month, another rationality quotes thread. The rules are: