Fear, uncertainty, and doubt

FUD（英語：Fear, Uncertainty, Doubt，意思為懼、惑、疑）最早指IBM销售人员對客戶灌輸阿姆達爾公司（英语：Amdahl Corporation）和其他競爭對手產品的負面觀念，在顾客的头脑中注入疑惑与惧怕，使顧客誤以為除了該公司的產品外，他們別無其他選擇。

District and Prince George's remained in doubt as of August 1991, with District officials saying that it made sense to build the Template:Wmata and Template:Wmata