One possibility, frequently cited by critics, is that these precursors are simply coincidences arising from the fact that Earth and its ionosphere are fairly noisy places, geomagnetically speaking.
Random coincidences arise when photons of two unrelated positron annihilations are detected within the coincidence timing window and are recorded as a single pair.
Similar examples of temporary coincidence can arise when objects gain or lose parts.
It's no coincidence that the performance arises amidst the Black Lives Matter movement and recent tragedies in Ferguson, Baltimore, and Cleveland.
And on the other side of the spectrum, the chill of menthol in peppermint also arises from an odd coincidence.
Remembering that Jets quarterback Vinny Testaverde tore his Achilles' tendon on Giants Stadium's artificial carpet, wiping out his 1999 season, a question arises: Were yesterday's injuries a coincidence or a reminder of the controversial dangers of artificial turf?
The challenge for Mill, and for other consequentialists, arises in those particular cases in which the coincidence fails.
An exciting question that arises from our dating results is the relative coincidence in time between speciation events and gene duplication events, as exemplified in Figures 2 and 3.
According to Lipton and Silberstein [2] comorbidity may arise by coincidence or selection bias, one condition may cause the other, both conditions may be related to shared environmental genetic risk factors, and the same environmental or genetic risk factors may determine a brain state that gives rise to both conditions.
Correlation coefficient r = 0.9928 is unlikely to arise by coincidence (p=0.0045).
