Initially derided by some mathematical purists, it is now considered essential methodology in certain areas. Candlestick was an object of scorn from baseball purists for reasons other than weather. Blues purists criticized the album's psychedelic sound. Despite the group's commercial success, they were never embraced by bluegrass or country music purists. The stadium was harshly criticized by baseball purists. This type of inconsistency is strongly criticized by language purists. Most of the concerts were met with heckling and disapproval from folk music purists. The version is often regarded with alarm by Italian spaghetti purists. It is however considered as inappropriate by purists. Thus all art is propaganda and ever must be, despite the wailing of the purists. Mu shu purists do not always react positively to this trend. VW purists in America and company executives in Germany were displeased. Other proposals by purists were sometimes accepted, and sometimes reverted again in later spelling revisions. However, cross-ratio calculations use metric features of geometry, features not admitted by purists. It is often called the toughest of the tough, and one for the Dakar purists.