Q. Sun metaphor assumes that light sources and dark bodies are different things, while you correctly see that every massive body radiates heat and is therefore a source of light. Message [422] referenced by [424]. Next Message by Walmart is [618]. [424] Hans: Can a tautology be absurd? Walmart [422] gives a definition of tautology and explains why something that gives value cannot have value. But it is not clear from his explanation why Marx calls it an ‘absurd tautology' that value of labour is determined by that labour. How can a tautology be absurd?