Sentence examples for has often been unclear from inspiring English sources

As a result, the Northern Alliance says United States policy has often been unclear.

This expansion is a source of considerable concern, 13 particularly because the Court has often been unclear and imprecise in its increasingly frequent invocation of harmless error.

In the past it has often been unclear whether the phosphenes seen by patients were due to the implant functioning correctly or to other factors, such as the recovery of photoreceptors triggered by the trauma of surgery a phenomenon known as the rescue effect.

The term 'global bioethics' has been bandied about in recent years, although its precise meaning has often been unclear.

The relationship between dose and clinical effect has often been unclear in past studies because of bias in the isolation frequencies of mixed sensitive and insensitive bacteria.

When positive outcomes have been demonstrated in studies, it has often been unclear which specific behavior change techniques (BCTs) were being applied (Michie, Fixsen, Grimshaw, & Eccles, 2009).

The foreigners brought cash and tactical and bomb-making knowledge to al-Shabaab, but the extent of the organisation's formal links to al-Qaida have often been unclear.

Pigs have been introduced successfully to many areas of the world, including many islands and in many of these cases, both the timing of introduction and their wild-domestic status have often been unclear [ 24].

This stem-loop structure, although its function is still unclear, has often been assumed to be associated with replication origin.

These patterns have often been observed, but it is unclear if they are a general result of human disturbance or specific to communities that are rich in species, in complex, spatially heterogeneous environments where the problem has often been investigated.

Patient handovers (handoffs) following surgery have often been characterized by poor teamwork, unclear procedures, unstructured processes, and distractions.