Like a surgeon
“You know, that’s the first thing I do when I hit a browser bug I can’t pin down - start cutting the styles in half. Doesn’t matter which half, just start narrowing down the potential culprits by halves until I’ve got it down to one or two lines. Glad I’m a web designer and not a surgeon. ‘Does it hurt now? How about now?’” Wilson Miner, on finding CSS bugs by elimination