What wiped out the dinosaurs, the Western Ghats eruptions or the Chicxulub impact event? What cause Rome to decline, Barbarian tribes, overexpansion, or lead pipes? If the theories are constantly changing, it is because the archaeologists and historians of the Dark Ages who look at such things have no choice but to draw far-reaching hypotheses from inadequate evidence.
Cycling can talk. From a single acceleration in the final 400m, which were as engrossing as any we have seen in the previous 1418.1 km, what lessons are we tempted to learn?