Maybe people aren't as stupid as psychologists think
While browsing the slides from Joshua Porter’s lecture, Leveraging Cognitive Bias in Social Design, I came across the following one, which presents the canonical example of the conjunction fallacy from Amos Tversky and Daniel Kahneman:
I wonder if a better explanation for the fact that about 85% of people pick the latter option is that, rather than the second option seeming simply “more ‘representative’ of Linda based on the description of her, even though it is clearly mathematically less likely,” people assume that the first option is implicitly “Linda is a bank teller and not active in the feminist movement.”
Rather than a logical fallacy, this may just be a case of a very common misinterpretation of the question.