Any company that is successful will inevitably induce competitors to enter the market. It is unlikely that several competing companies will engage in predatory pricing simultaneously. It is only competition or the threat of competition that keeps companies from raising prices. Any pricing practice that does not result in unreasonable prices should be acceptable.
From time to time there is a public outcry against predatory pricing -- where a company deliberately sells its products at prices low enough to drive its competitors out of business. But this practice clearly should be acceptable, because even after its competitors go out of business, the mere threat of renewed competition will prevent the company from raising its prices to unreasonable levels.
Which one of the following is an assumption on which the argument depends?