Comment by jdiff

Completely agree that error tolerance depends on what it is that we're doing. Some things demand no errors at all, some things have a cost to attempt, some things you can't pre-evaluate for correctness if you don't already have the prerequisite knowledge and you only get one chance. Not everything is software where we can conjure 50 more end-to-end tests to ward off demons. When it's not a harmless throwaway weekend project, 7% is already a huge error rate before you ever think of feeding it back into itself.