Before revision: A 1984 article said "the hard evidence for Ardrey's killer-ape hypothesis, all from Dart, is slim" and was refuted by paleontologists in the early 1970's, in particular CK Brain and Elisabeth Vrba.
After revision: A 1984 article said Dart's evidence was slim, and was refuted by paleontologists in the early 1970's, in particular CK Brain and Elisabeth Vrba.