All of your examples have direct parallels >A bad DNS can make it appear your Internet is out in one way broken wire in the power system between your house an

All of your examples have direct parallels >A bad DNS can make it appear your Internet is out in one way broken wire in the power system between your house and the pole (is your neighbor digging?) >while a broken cable inside the house can make it look broken another way i think thats pretty direct. a broken wire in your house makes it seem like the power is out. >a virus on a computer is another I could have a device flipping my circuit breaker, or corrosion on wires. My faucet could have any number of bacteria. >When is the last time your water pipe had a virus http://www.fair-safety.com/fair-outbreaks/view/county-fair-washington-county-new-york/ http://www.fair-safety.com/fair-outbreaks/view/county-fair-w... 1999 >It will often taken digging into the problem with a fair bit of domain knowledge like electricians and plumbers?