It's a learnable skill although it is quite difficult, particularly if you didn't write the code (recently). And it's very useful because at some point the debu

It's a learnable skill although it is quite difficult, particularly if you didn't write the code (recently). And it's very useful because at some point the debugger (or logging[1]) will let you down. [1] I myself don't use a debugger much; I'm frequently working on something distributed where a debugger is laughably useless.