''What is more likely, that a seven-letter word randomly selected from a novel would end in ing or has the letter “n” as its sixth letter? This highlights both the availability bias and the conjunction fallacy. All seven-letter words ending with ing have the letter “n” as its sixth letter, but not all with the letter “n” as its sixth letter end in ing. Again, the driving force for the conjunction fallacy is the availability bias. Words ending with ing come to mind more easily.''

"Can you outsmart this logical fallacy? - Alex Gendler"

The conjunction fallacy is a formal fallacy that occurs when it is assumed that specific conditions are more probable than a single general one. The most often-cited example of this fallacy originated with Amos Tversky and Daniel Kahneman: "Linda is 31 years old, single, outspoken, and very bright. She majored in philosophy. As a student, she was deeply concerned with issues of discrimination and social justice, and also participated in anti-nuclear demonstrations. Which is more probable? 1. Linda is a bank teller. 2. Linda is a bank teller and is active in the feminist movement." The majority of those asked chose option 2. However, the probability of two events occurring together (in "conjunction") is always less than or equal to the probability of either one occurring alone [...]