J.L.Austin says that `unreal' wears the trousers, and contrasts `real' with synthetic, ersatz, artificial, imaginary, illusory, etc. But remember that the word was coined by philosophers, not shop-keepers.

Marks of Reality

1. . not dependent on any person, not subjective
   
2. . independent of the observer
   
3. . independent of whether known or not; contrasted with epistemic
   
4. . resistant to will; brute facts; what happens willy-nilly
   
5. . independent of other things (cf. Faraday's arguments for the real existence of fields).
   
6. . not transient; permanent
   
7. . completely determinate
   
8. . rational, explanatory
   
9. . required (to be quantified over) by well-established theory (Quine: ``To be is to be the value of a variable'')
   
10. . has massergy
    
11. . independent of whether constructed or not
    
12. . corrigible.

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