I don't reach for a debugger often, instead relying on sanity checks and traces. But when I do reach for a debugger, it's because I am so completely confounded

I don't reach for a debugger often, instead relying on sanity checks and traces. But when I do reach for a debugger, it's because I am so completely confounded by what is going on, and I have started questioning even the most basic of assumptions, that I just want to watch the damn thing execute.