This notion was revived in the 1950s, when the building of a genuine chess-playing machine was seen by artificial-intelligence researchers as a stepping-stone towards a general theory of machine intelligence.

ECONOMIST: Computers and chess

As the researchers noted, someone's theory about intelligence may not make much difference when times are easy.

WSJ: How to Overcome Failure

The central mandate of FISA, and of the NSA, had not changed in theory: foreign intelligence gathering.

ENGADGET: Editorial: We, the digitally naked

The theory of fluid and crystallized intelligence provides some clues.

FORBES: The Rising Silver Tide: Aging as Counter Current to Innovation

These people believe in the Technological Singularity theory: The possibility that technologically augmented intelligence will change human life as we know it or possibly wipe it out completely.

CNN: Apocalypse believers' big finish predictions vary

Gill's placement in the sensitive intelligence job has alarmed government officials because it fits the operating theory of prosecutors and investigators that Alamoudi was part of a long-term scheme by Islamic extremists to place friendly, if perhaps unwitting, associates in key U.S. government positions.

CENTERFORSECURITYPOLICY: Islamist penetration of Homeland Security?