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We show that the ``effective Lagrangian'' constructed in [1] is inconsistentwith the exact result for the complete Lagrangian presented in [2]. We tracethe origin of the inconsistence to the peculiar way in which the path integralmethods are used to eliminate variables that are not auxialiry.

Comment on ''A path integral leading to higher-order Lagrangians, arXiv:0708.4351 [hep-th]''