Sentence examples for this has been challenged from inspiring English sources

For the first time, I feel that this has been challenged.

With respect to employment tribunal fees, this has been challenged in the strongest of terms by the supreme court.

This has been challenged as a matter of principle in the courts on a number of occasions.

However, this has been challenged by numerous reports, including the current European guidelines for perioperative bleeding management, which question the utility and reliability of SLTs in this setting.

Some critics alleged that petty peacekeeping, notably in the Balkans, was eroding the readiness of the army to fight big wars, although this has been challenged in recent weeks by Charles Moskos, an influential military sociologist.

Historically, poor outcome has often been considered to be an integral part of the concept of schizophrenia, though in recent times this has been challenged by many cross-cultural studies.

"Clearly this has been challenging".

"We have transferred all of our accounts onto a new £200m customer service system and this has been challenging.

However, this has been challenging, in part due to the aggressive nature of NRAS-mutant melanomas.

This has been challenging even when the number of data points is just over a few thousands [5][6].

Realising this has been challenging and the implementation of the '20 hours free' policy became a controversial media story.