(see also 99.5% of programming job candidates fail the FizzBuzz test, though this seems a stretch).
This is misleading. Bad programmers spend more time interviewing before being hired, thus the pool of job interview candidates is biased towards bad programmers.
It isn't cited + it seems awfully high -> the number is probably exaggerated at some level of intentionality
What is something you used to believe, preferably something concrete with direct or implied predictions, that you now know was dead wrong. Was your belief rational given what you knew and could know back then, or was it irrational, and why?
Edit: I feel like some of these are getting a bit glib and political. Please try to explain what false assumptions or biases were underlying your beliefs - be introspective - this is LW after all.