The train of thought or track of thought refers to the interconnection in the sequence of ideas expressed during a connected discourse or thought, as well as the sequence itself, especially in discussion how this sequence leads from one idea to another.

When a reader or listener "loses the train of thought" (i.e., loses the relation between consecutive sentences or phrases, or the relation between non-verbal concepts in an argument or presentation), comprehension is lost of the expressed or unexpressed thought.

The term "train of thoughts" was introduced and elaborated as early as in 1651 by Thomas Hobbes in his Leviathan, though with a somewhat different meaning (similar to the meaning used by the British associationists):

When a man thinketh on anything whatsoever, his next thought after is not altogether so casual as it seems to be. Not every thought to every thought succeeds indifferently.

See also

Train of thought is the sequence of thought or speech.

The expression may also refer to:

Train of Thought is the debut album of American hip hop duo Reflection Eternal, released October 17, 2000 on Rawkus Records. Collaborating as a duo, rapper Talib Kweli and DJ and hip hop producer Hi-Tek recorded the album during 1999 to 2000, following their individual musical work that gained notice in New York's underground scene during the late 1990s. Kweli had previously worked with rapper Mos Def as the duo Black Star, and Hi-Tek had served as producer on the duo's debut album.

Produced primarily by Hi-Tek, the album is characterized by dynamic, high-tempo tracks and a Soulquarians-type neo soul sound. It showcases Kweli's rapping and features themes of revolutionary mentality, love, the state of hip hop, and modern African-American culture. Upon its release, Train of Thought achieved moderate sales success and received critical acclaim from music critics. Train of Thought is now considered a classic album, and one of Kweli's best works.

Reception

A-ha (stylized as a-ha; Norwegian pronunciation: [ɑˈhɑː]) are a Norwegian band formed in Oslo in 1982. The band was founded by Morten Harket (vocals), Magne Furuholmen (keyboards) and Pål Waaktaar-Savoy (guitars). The group initially rose to fame during the mid-1980s after being discovered by musician and producer John Ratcliff, and had continued global success in the 1990s and 2000s.

A-ha achieved their biggest success with their debut album, Hunting High and Low, in 1985. That album peaked at number 1 in their native Norway, number 2 in the UK, and number 15 on the US Billboard album chart; yielded two international number-one singles, "Take On Me" and "The Sun Always Shines on TV"; and earned the band a Grammy Award nomination as Best New Artist. In the UK, Hunting High and Low continued its chart success into the following year, becoming one of the best-selling albums of 1986. In 1994, after their fifth studio album, Memorial Beach, failed to achieve the commercial success of their previous albums, the band went on a hiatus.