Sentence examples for their effectiveness is questionable from inspiring English sources

They can be intimidating and their effectiveness is questionable.

Their effectiveness is questionable but Europe is likely to have to follow suit.

We are unaware of any studies that have used these approaches in mammals and their effectiveness is questionable given the relatively long generation times of mammals (see Collins et al. 2014 for examples from shorter generation taxa).

In essence, this study demonstrated that participants adopted recommended protective measures even when their effectiveness was questionable.

If the drug effects are as small as these meta-analyses suggest, then their clinical effectiveness is questionable.

Even if you take the title at face value and in strictly military terms, Edward's effectiveness is questionable.

The fourth and last category includes roads with operating conditions at or near the capacity level where upgrading effectiveness is questionable.

Expansionary monetary policy, aka "quantitative easing," is one thing, but its effectiveness is questionable.

Moreover, the validity of the ratio F N / F P. as an index of effectiveness is questionable [ 203].

A reduction in dose in the offending antipsychotic is the simplest treatment strategy, but its effectiveness is questionable and it carries the risk or precipitating an exacerbation or relapse of psychotic symptoms.

As with all homemade remedies, its effectiveness is questionable.