A K-line, or Knowledge-line, is a mental agent which represents an association of a group of other mental agents found active when a subject solves a certain problem or formulates a new idea.
"[1] "Whenever you 'get a good idea', solve a problem, or have a memorable experience, you activate a K-line to 'represent' it.
A K-line is a wirelike structure that attaches itself to whichever mental agents are active when you solve a problem or have a good idea.
When you activate that K-line later, the agents attached to it are aroused, putting you into a 'mental state' much like the one you were in when you solved that problem or got that idea.
The concept of K-lines has several theoretical implications for understanding memory and problem-solving in artificial intelligence and cognitive science: While influential, the K-line theory has also faced some criticism and limitations: