English

Adjective

uncheckable ‎(not comparable)

1. Incapable of being checked.
   • 2012, Michael Brooks, The men who stare at Jon Ronson (in New Statesman, 22 March 2012)

     But the closed nature of the models used for virtual transactions, where nothing is actually bought or sold, means their accuracy is uncheckable: there is no "real world" aspect to the process.