Sentence:  Yet here's the more pervasive problem: I don't buy the logic that a single race as Saratoga is <WSD>unclockable</WSD> when every week, at tracks all across the country, races are being “silently” contested with skewed fractional and final times, largely because of ambiguous “about” distances, clocking equipment malfunctions, human errors, and ever-changing timing beam run-ups that vary not only from track to track, but from race to race over the same courses. 
Meaning of the word marked with <WSD> tags:  At a speed that cannot be measured.