> Only the market, where consumers put their hard-earned dollars at work, can tell us how many brands of deodorant are needed. Not even 'the market' can do thi

> Only the market, where consumers put their hard-earned dollars at work, can tell us how many brands of deodorant are needed. Not even 'the market' can do this. Unless you mean it in some sort of tautological sense - e.g. only the market can tell us how many brands of deodorant the market can bear.