unreliable

And Buettner says he was always aware of the problem of unreliable records, which is why he worked with scientists who verified centenarians’ ages.

The delays also disrupted vessel replacement plans, with CalMac now under huge pressure to maintain services with an ageing and increasingly unreliable fleet.

Since then dozens of people have got in touch with BBC News, many saying that buses remain fundamentally unreliable.

Many pollsters have also shifted to using online surveys, but experts said those were known for being unreliable.

“You see how challenging it was for her to confront so much of her own story. It’s also a window into her as an unreliable narrator.”