OK, suppose there are four guys in the race. The four are Geb, El G, Kenny B, and Tadese all in top shape.
Suppose further that El G, Kenny B, and Tadese get together before the race and try and develop a strategy to beat Geb. The strategy could be:
El G goes out at WR mile pace. If Geb goes at say, marathon pace, he gets lapped and loses, because marathon pace is about 35.26 per 200. 7 laps at that pace is 4:07 or so and El G just ran 8 laps plus in 3:48.
If Geb goes out just fast enough to not get lapped by El G in a mile, that would be say 7 laps in 3:48. That is (if I did the math right) 32.57 for the 200 or about 1:54:30 for the marathon. With this strategy, after the mile, I assume El G has to slow down, gets lapped and loses.
Now, Kenny B and Tadese have to also not get lapped here, so they have to be around the same 7 laps in 3:48. Suppose Kenny B now picks up the pace to WR 10000 pace, or about 31.6 per 200 and goes until he can't go anymore.
All Geb has to is not get lapped by Kenny B for the next 8000 or so. So 8000 at 31.6 per 200 is 21:04. If Geb can run 7800 in 21:03, he won't get lapped by Kenny B, and then Kenny B has to slow down at some point. 7800 in 21:03 is about 32.38 per 200 or 1:53 something for a marathon. Tadese has to not get lapped too, so he has to run about that pace. After Kenny B has shot his wad, I assume he slows, gets lapped, and loses.
Now it is just Geb and Tadese. If Tadese starts running 20K pace, his WR for 20K is 55:21, so that's about 33.2 per 200, slower than he and Geb have been running. So all Geb has to do is not get lapped over the next 10000 or so, as they have already run 9600 at an uneven pace.
So 33.2 per lap is 27:40 for 50 laps. If Geb can run 27:39 for 49 laps(9800), that's about 33.88 per 200 or about 1:59 and change for the marathon. Once Tadese is exhausted, he gets lapped and Geb wins. This whole thing assumes Geb can cope with the changes of pace, etc.
I don't see how the marathon world record holder loses this one.