A syndrome is a set of medical signs and symptoms that are correlated with each other and, often, with a particular disease or disorder. The word derives from the Greek σύνδρομον, meaning ``concurrence''. In some instances, a syndrome is so closely linked with a pathogenesis or cause that the words syndrome, disease, and disorder end up being used interchangeably for them. This is especially true of inherited syndromes. For example, Down syndrome, Wolf--Hirschhorn syndrome, and Andersen syndrome are disorders with known pathogeneses, so each is more than just a set of signs and symptoms, despite the syndrome nomenclature. In other instances, a syndrome is not specific to only one disease. For example, toxic shock syndrome can be caused by various toxins; premotor syndrome can be caused by various brain lesions; and premenstrual syndrome is not a disease but simply a set of symptoms.

is a syndrome the same as a disease?

A: yes


Thrust SSC holds the world land speed record, set on 15 October 1997, when it achieved a speed of 1,228 km/h (763 mph) and became the first land vehicle to officially break the sound barrier.

has anyone broken the sound barrier on land?

A: yes


Nineteen men have been awarded the Medal of Honor twice. The first two-time Medal of Honor recipient was Thomas Custer (brother of George Armstrong Custer) for two separate actions that took place several days apart during the American Civil War.

has anyone ever received more than one medal of honor?

A: yes


The economy of California is the largest in the United States, boasting a $2.746 trillion gross state product as of 2017. As a sovereign nation (2017), California would rank as the world's fifth largest economy, ahead of the United Kingdom but behind Germany. California is also home to some of the most valuable companies in the world, including Apple, Alphabet Inc., and Facebook.

is california the 8th largest economy in the world?

A:
no