Something at least remotely analogous to the nervous system seems to have evolved in some plants, which use cells with something like action potentials to drive rapid movement or rapid changes of chemical behavior in response to environmental stresses.

Bats also have high encephalization quotients, and corvids seem to have the sorts of behaviors characteristic of high encephalization quotients, though both may be too absolutely small to become civilized absent unusual environmental conditions.

The latter three items all seem sufficiently rapid to provide little evidence in any event.
Given the tendency of humans to live close to sea level and the fact that sea levels have changed greatly in the last 13K years, I would also say that our data on ancient man is very questionable, although we can infer an absence of the sorts of domestication that modern humans engage in except for the dog and an absence of long distance trade which might disseminate rats etc prior to the late neolithic from the evolutionary record.