Honey is a complex substance, containing up to 800 compounds and its complexity means it has been difficult to pinpoint exactly how it kills bacteria.

CNN: Study: Honey can kill superbugs

Wine is a more complex substance than one might think, and, above two thousand metres, and at close to zero degrees centigrade, it displays interesting behavioral anomalies.

NEWYORKER: Bear Meat

Cases that reach the appellate level are sometimes murky, involving possible mental illness, substance abuse or other complex issues.

WSJ: Two Lawyers Strike Gold in U.S. Disability System

This view, which reflects a breathtaking certitude on a variety of complex judgments, assumes away the substance of the controversy.

CENTERFORSECURITYPOLICY: Center for Security Policy | Neither Isolationists Nor Fools, By Richard PerleThe New York Times, 19 October 1999

Ore from the mine is processed at Jaduguda into a substance called U308 - commonly known as yellow cake - and then sent to the Nuclear Fuel Complex in the southern city of Hyderabad, where uranium fuel rods are produced.

CNN: NUCLEAR FALLOUT