Concert promoter: Some critics claim that our concert series lacks popular appeal. But our income from the sales of t-shirts and other memorabilia at the concerts is equal to or greater than that for similar sales at comparable series. So those critics are mistaken. The concert promoter's argument is flawed in that it ['takes for granted that the comparable series possess popular appeal', 'draws a conclusion about the popularity of a series based on a comparison with other, dissimilar events', 'takes for granted that income from sales of memorabilia is the sole indicator of popular appeal', 'attacks the critics on the basis of emotional considerations rather than factual ones']