 A further objection is that Marx’s assertion that only labour can create surplus value is unsupported by any argument or analysis, and can be argued to be merely an artefact of the nature of his presentation. Any commodity can be picked to play a similar role. Consequently, with equal justification one could set out a corn theory of value, arguing that corn has the unique power of creating more value than it costs. Formally this would be identical to the labour theory of value (Roemer 1982). Nevertheless, the claims that somehow labour is responsible for the creation of value, and that profit is the consequence of exploitation, remain intuitively powerful, even if they are difficult to establish in detail.