[en] It is stated that recently there have been a variety of attempts to calculate the energy and saturation density of the fictitious infinite translationally invariant system of nucleons interacting without Coulomb forces, which has come to be regarded as 'nuclear matter'. A definitive converged microscopic calculation for 'nuclear matter' would be a valuable tool for exploratory details of nuclear and mesonic interactions, a prelude to the systematic evaluation of the properties of finite nuclei, and a crucial first step in exploring the equation of state of dense matter for astrophysical purposes. In these comments a review is made of some recent results that call into question just how far progress has been made in ability to solve the non-relativistic many-body problem with purely two-body interactions. (U.K.)