  Recent large scale structure observations, including COBE, have prompted many
authors to discuss modifications of the standard Cold Dark Matter model. Two of
these, a tilted spectrum and a gravitational wave contribution to COBE, are at
some level demanded by theory under the usual assumption that inflation
generates the primeval perturbations. The third, whose motivation comes by
contrast from observation, is the introduction of a component of hot dark
matter to give the Mixed Dark Matter model. We discuss the implication of
taking these modifications together. Should Mixed Dark Matter prove necessary,
very strong constraints on inflationary models will ensue.
