The Letter challenges a number of long-held assumptions.

It is not hard to see why when, within weeks, data from large and rigorous studies have thrown into question two long-held assumptions about preventive medicine.

These are turbulent times, and some long-held assumptions may no longer apply.

He acknowledged, however, that the crash had thrown many long-held assumptions into question.

Contrary to long-held assumptions, all calories are not equal.

The finding contradicts the long-held assumption that periodicals are more vulnerable than books to competition from the Internet.

It could be a long-term strategy of his party also to break that long-held assumption .

It confirms some long-held assumptions and includes some eye openers as well.

The simulation is a great way to procure ammunition for political arguments with friends and family, or to simply test long-held assumptions.

It's certainly blown apart one of my own long-held cultural assumptions.