Suppose you were an electrician. You've trained, apprenticed, passed all your certifications, and you've worked with electric wiring for years. You've wired houses and commercial buildings for years, and you feel pretty confident in your trade. One day you finish wiring a light switch, dust off your hands, and flip the switch to test it. But instead of seeing the light turn right on, you find that it flickers dimly. You're pretty sure you wired things correctly, so what do you do?