Hard disagree. Most of the time I have a specific failure case in mind when I open my debugger. It's very easy to see which if statements the failure case takes

Hard disagree. Most of the time I have a specific failure case in mind when I open my debugger. It's very easy to see which if statements the failure case takes and to run again looking at what variables caused it to take those if statements. Usually the problem becomes obvious after that and it's not unusual for bad variables to be passed into the function; which a debugger can help with as well