Only according to Creationists. It has long been established that
A. afarensis was bipedal, and indeed
A. afarensis changed the previous belief that an increased brain size preceded bipedal locomotion - when, in fact, the reverse was true.
Wikipedia has a list of skeletal features that point to bipedal motion.
she was a knuckle walker, according to this study done....
"A. anememsis and A. afarensis- the latter represented by the famous skeleton known as Lucy - had wrists capable of locking the hands in place during knuckle walking." - Science News April 8, 2000
It is common knowledge that lucy's hands and feet were also highly curved as to promote suspension from limbs, and not a foot of an upright walker. (Stern, J., and Susman, R., American Journal of Physical Anthropology 60(3):279–317, 1983. )
distinctly quadrupedal specialization characteristic of some living apes and is quite different than walking upright. Richmond and Strait identify four skeletal features of the distal radius of the living knuckle-walking apes, chimpanzees and gorillas. They also identify similar morphological features on two early ‘hominids’, including Lucy:
‘A UPGMA clustering diagram … illustrates the similarity between the radii of A. anamensis and A. afarensis and those of the knuckle-walking African apes, indicating that these hominids retain the derived wrist morphology of knuckle-walkers.’...
Richmond, B.G. and Strait, D.S., Evidence that humans evolved from a knuckle-walking ancestor, Nature 404(6776):382, 2000.
same book says "there is no evidence that any extant primate has long, curved heavily muscled hands and feet for any purponse other than to meet the demands of full or part time arboreal (tree) life."
ape feet are hardly able to make a left right stride as humans have
secondly,
Lucy’s entire skeleton was found about two and a half kilometers from the site in which the bipedal knee joint was found. The conclusion that both fossils originate from the same species is questionable, and might have been influenced by Johanson’s pre-existing biases. To this day the argument continues about the validity of the dating of Lucy’s bones, as well as the other scattered bones found in the same vicinity. This argument does not add credibility to the claim that the knee joint Johanson found previously belongs to the same species as Lucy, or even that they are from the same period of time.
..from the same essay
When Lucy’s bones were examined, they didn’t add up to her being a biped. The pelvis was the biggest problem, as it didn’t seem to allow for Lucy to walk upright.
http://www.smarterthanthat.com/biol...discovery-of-lucy-australopithicus-afarensis/