  We revisit the problem of constructing an elusive scaling theory of the
strange metal phase of the cuprates. By using the four robust experimentally
established temperature dependencies as the constitutive relations we then
predict the scaling behaviors of a number of other observables, all those for
which the reliable data are available being in agreement with experiment. Such
predictions are also contrasted against the recent proposal inspired by the
holographic approach, thus allowing one to critically assess the status of the
latter.
