 Writers such as Robert A. W. Lowndes, Farmer, and Michael Moorcock have criticized the novel for being a hypothetical utopia, in the sense that while Heinlein's ideas sound plausible, they have never been put to the test.Moorcock wrote an essay entitled "Starship Stormtroopers" in which he attacked Heinlein and other writers over similar "Utopian fiction".Lowndes accused Heinlein of using straw man arguments, "countering ingenuous half-truths with brilliant half-truths".