Scott, of course you're a much better journalist than I am (ha, ha, I crack myself up).
So, I'll try again.
If you're claiming chip timing is inerrant, you are positively wrong.
It frequently makes errors - more precisely, does not read - and if you time races, like I do, or host national championships like I have (four in five years), then you know you need at least one backup system and often two.
The current technology is unreliable.
I'll try to be both simple and give a full explanation at the same time, while accounting for my non-technical background.
Chip timing requires proper positioning of the chip as it rapidly moves through the magnetic field at the finish line.
The chip - which contains a transponder and an electronic coil - does (theoretically) send a signal when it arrives within the magnetic field created by the mat (or mats).
The mats have two antennas, one creating the magnetic field and one to detect the signal from the chip and collect the ID number. If one fouls up, the system is fouled up.
What can go wrong? Plenty.
* Disruption or surge in the energy supply to the mat.
* An inactive chip.
* Rebar in the street, or metal in the finish line structures, interfering with the magnetic field.
* Foot is too high off the ground when passing the mat.
* Etc.
Of course, select timing, cameras and even pulling tags can resolve missed chips.
How many people does an average race miss? How often does the backup mat 6 feet beyond the finish catch the time instead of the main mat? How often does the chip only trigger when it first enters the magnetic field, say 3 feet in front of the finish line?
You may not realize, but the timing companies are always making corrections/additions that go unnoticed to runners and even astute members of the media such as yourself.
The error rate for a typical chip timing system is in the 1-7 percent range. The new D-tags have a higher error rate, and can exceed 10 percent, but hey, they're cheap!
It's an imperfect system, run by imperfect people, in an imperfect world. But for so long, it's all we had.
That you didn't know this just means you weren't paying proper attention.