Taken together, some 2, 000 stocks recommended on a popular television show over the course of the past 12 years by the show' s guests, most of whom are successful consultants for multibillion-dollar stock portfolios, performed less successfully than the market as a whole for this 12-year period. So clearly, no one should ever follow any recommendations by these so-called experts. Each of the following, if true, weakens the argument EXCEPT: ['The stock portfolios for which the guests were consultants performed better for the past 12 year period than the market as a whole.', 'Performance of the stocks recommended on the television show was measured independently by a number of analysts, and the results of all the measurements concurred.', 'Taken together, the stocks recommended on the television show performed better than the market as a whole for the past year.', 'Performance of the stocks recommended on the telephone show was measured by stock dividends, whereas the performance of the market as a whole was measured by change in share value.']