Troubleshooting by smell: noticing what’s off before you know why

The useful part of experience isn’t the answers, it’s the flinch you get a half-second before you can explain it. Here’s how I try to teach that.

The useful part of experience isn’t the answers, it’s the flinch you get a half-second before you can explain it. Here’s how I try to teach that.

Twenty minutes of very confident debugging later: it was the router, and the router had told nobody.