To this end, I picked up a 1982 paper by Kahneman and Tversky which was published in Cognition. The paper is entitled On the study of statistical intuitions, and is the earliest academic citation I could find for conjunction fallacy... although the usual "original experiment" is another paper.
In my reading, however, I came across the following:
Errors and biases in judgement under uncertainty are the major source of data for the mapping of the boundaries of people's statistical intuitions. In this context it is instructive to distinguish between errors of application and errors of comprehension. A failure in a particular problem is called an error of application if there is evidence that people know and accept a rule that they did not apply. A failure is called an error of comprehension if people do not recognize the validity of the rule that they violated.
An error of application is most convincingly demonstrated when a person, spontaneously or with minimal prompting, clutches his head and exclaims: 'How could I have missed that?'
Then I realized that I'd been finding a peer-reviewed journal article humorous. Gyah, does grad school ever mess with your brain...