Train of thought
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The train of thought, stream of thought, chain of thought refers to the interconnection in the sequence of ideas expressed during a connected discourse or thought, as well as to 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, they lose comprehension of the expressed or unexpressed thought.[1]
Inability to maintain one's train of thought is among the symptoms of thought disorder, either because of mental illness or drug abuse.
The term "train of thoughts" was introduced and elaborated as early as in 1651 by Thomas Hobbes in his Leviathan in a somewhat different meaning, like that of the British Associationists:
By Consequence, or train of thoughts, I understand that succession of one thought to another which is called, to distinguish it from discourse in words, mental discourse.
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. [1]
See also
- Absent-mindedness
- Internal monologue
- Mind-wandering
- Association of Ideas
- Associationism
- Stream of consciousness
- Pilcrow
