The oscillococcus bacterium has never been independently observed.

Bernstein et al. independently observed a reduced breast cancer risk when women were injected with hCG for weight loss or infertility treatment.

If the actions cannot be independently observed at all though, this might force the optimal contract to contain some element based on general risk, in order to provide incentives to efficiency.

Claims of these phenomena go back at least 1,000 years, with some having been observed independently by multiple witnesses or reputable scientists.

As of April 2008, the effect has not yet been observed independently.

Besides Mathios, it was independently observed by three other persons around 6:50am.

Since these anomalies are not independently observed the foremost challenge to these claims is that the evidence is flawed.

The suggested causes of a given phenomenon cannot always be independently observed, and so it is hard to rule out the possibility of there being explanations alternative to the one proposed.

In fact, as I mentioned, ABC was independently observed to have been the most hostile to Reagan.

It was independently observed by other astronomers after Hodierna.