You've just found that a major component of this debate was completely foreign to you. Now you've quickly decided that it's so silly you should make fun of it. Use the Try Harder, Luke.
Most of the debate is foreign to me. I've heard general arguments, but I've never once bothered to look into the numbers. I am not ignorant of the debate because I was irrationally assuming no additional information exists. I am ignorant because I never felt the need to stop being ignorant.
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.