Abstract
It is pointed out that the Urbana, Stony Brook, and Bonn groups treat the $\ensuremath{\Delta}$-isobar contributions to the $\mathrm{NN}$ interaction in different ways, which lead to different conclusions regarding the overcounting problem. It is questioned whether, in a field-theoretic framework neglecting quark-theoretic viewpoints, the $\ensuremath{\pi}N$ system, in general, and the Chew-Low model, in particular, can serve as reliable testing grounds for boson-exchange models of the $\mathrm{NN}$ interaction.NUCLEAR STRUCTURE $\mathrm{NN}$ interaction, $\ensuremath{\Delta}$ isobars, $\ensuremath{\pi}N$ system.
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