Abstract
Two recently published solutions to np scattering from 550 to 800 MeV are used to obtain the differences in predicted values for a number of selected spin observables over this very important, and presumably well measured, kinematic domain. Plots reveal differences as large as 1020 times the measurable accuracy of these parameters exist over vast regions of energy and angle. A much greater experimental effort is clearly needed before the np amplitudes will be known. Planning for future measurements could be facilitated with the use of programs developed for this study.

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