Examples from the Web for perfectible
We in our land of optimists like to believe our species is perfectible.In Syria, Europe & Boston, the Past Is Never Finished|Kati Marton|May 11, 2013|DAILY BEAST
Neither markets nor government are perfectible; the best we're going to get is ones that work pretty well most of the time.
Hence he is perfectible through nature, and merely conforms to nature in improving his mind and in bettering his condition.The Origins of Contemporary France, Volume 1 (of 6)|Hippolyte A. Taine
You pretend man's perfectible, that woman's got a capacity for disinterested self-sacrifice.Sonia Between two Worlds|Stephen McKenna
But as man is perfectible this condition of things cannot last.The Radicalism of Shelley and Its Sources|Daniel J. MacDonald
The Mennonites believed that man was essentially depraved; Ballou believed that he was perfectible.Introduction to Non-Violence|Theodore Paullin
Man is not a perfectible animal; not on this side of eternity.Egoists|James Huneker