The mechanism is broken but there isn't anything wrong with the design. The wheels sometimes turn too fast and other times too slow. Oftentimes as if it doesn't have anyone at the controls at all. These instances are sporadic of course and the test results are inconclusive. This inevitably sparks the debate on what can actually be charted? Statistically speaking of course--and who wants to record the data? Employed to meticulously jot down every time the mind drifts and the emotions follow. Who could actually chart such evidence and what form of graph would one use? I would imagine the information would be matched to those with paralleling symptoms, similar demographic locales and of course those too suffering from dying. The latter would include everyone entering into this hemisphere. No one leaves this place untouched. And sometimes the evidence can't be assessed.