although various authors (most notably niels bohr) criticised the ambiguous terminology of the epr paper, the thought experiment nevertheless generated a great deal of interest. their notion of a "complete description" was later formalised by the suggestion of hidden variables that determine the statistics of measurement results, but to which an observer does not have access. bohmian mechanics provides such a completion of quantum mechanics, with the introduction of hidden variables; however the theory is explicitly nonlocal. the interpretation therefore does not give an answer to einstein's question, which was whether or not a complete description of quantum mechanics could be given in terms of local hidden variables in keeping with the "principle of local action".