Sentences with phrase «nagging question persisted»

But the mechanism remained a mystery, and one nagging question persisted: If inflammation drives most loneliness - linked diseases, how can cortisol, with its anti-inflammatory properties, be the culprit?

Yet a nagging question persisted: If the contraptions really were putting out more energy than they took in, what could be responsible?

But as so often with Tillmans, the nagging questions persist...