The phase crossover in the energy range Delta T similar or equal to 50-60 MeV as explicitly suggested by the results of lattice calculations at mu = 0 is interpreted here in terms of an evolving superposition of hadron and subhadron states of nuclear matter, the former being gradually displaced by the latter with increasing temperature. It is shown that the expected imperfectness of the quark-gluon gas even at temperatures substantially higher the chiral-transition temperature may he a direct consequence of a slow decrease [in proportion to I/ln(T/Lambda)] in the Coulomb part of the color particle interaction at short distances.
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