Harrold Foods is attempting to dominate the softdrink market by promoting "Hero, " its most popular carbonated drink product, with a costly new advertising campaign. But survey results show that, in the opinion of 72 percent of all consumers, "Hero" already dominates the market. Since any product with more than 50 percent of the sales in a market is, by definition, dominant in that market, Harrold Foods dominates the market now and need only maintain its current market share in order to continue to do so. The argument commits which one of the following errors in reasoning? ['failing to exclude the possibility that what appears to be the result of a given market condition may in fact be the cause of that condition', 'mistaking a condition required if a certain result is to obtain for a condition that by itself is sufficient to guarantee that result', 'taking evidence that a claim is believed to be true to constitute evidence that the claim is in fact true', 'treating the failure to establish that a certain claim is false as equivalent to a demonstration that that claim is true']