Poor vocabulary, most probably, not being a native speaker. But I wanted to emphasize the fact that it was not just a stupid decision, but a well-documented stu

Poor vocabulary, most probably, not being a native speaker. But I wanted to emphasize the fact that it was not just a stupid decision, but a well-documented stupid decision. It takes few minutes on google to learn that it is detrimental to learning (with scientific facts), and if everybody can do stupid mistakes, I call insisting on doing documented mistakes being "retarded". And no, I did not intend to attack handicapped people, this is just plain ridiculous. But you may have a better, more suitable adjective for that.