However, self-reported non-celiac gluten sensitivity may not be a discrete entity or part of this spectrum disorder bringing its role in functional bowel disorders like irritable bowel syndrome into question.

Existing essentially as a series of selfcontained, discrete entities, the chapters form a set of variations on a theme, finding among themselves points of harmony, discord, exposition and counterpoint.

There are many discrete entities that are easily detected but difficult to count.

Many scientific research questions require a means to measure the frequency or count of discrete entities in a given unit of volume.