Please, don't go throwing around terms like "daft". It only discredits you. And you also just demonstrated that you do not even understand the concept of evidence. Not only is Lucy scientific evidence for human evolution she is strong scientific evidence. She was the "missing link" that creationists demanded.
Let's go over your claims that show how little that you know. Yes, it is only 40% of a skeleton, but guess what, humans and other apes are bilaterally symmetrical. That means that we could have up to 80% of her bones represented. One's right knee is a mirror image of one's left knee. You really should not listen to lying sources. I can tell that you did by your answer. Do you know what her skeleton tells us? Her knees tell us that she was bipedal. Her skull tells us that she was bipedal. Her hips tell us that she was bipedal. There is no doubt that she was bipedal. Her hips are also much more similar to ours than to chimps, our closest ape relation.
I am going to briefly define scientific evidence for you:
Scientific evidence is
evidence that serves to either support or counter a
scientific theory or
hypothesis
Human evolution, in fact evolution in general is a testable concept. I can name various tests that exist for both. That means that it is a scientific theory or hypothesis. And the Lucy fossils and other Australopithecus afarensis finds all support the theory of evolution. That means that they are scientific evidence. Since it is scientific evidence that actually puts a burden of proof upon you. You can't get away with just denial. You only prove that you are not qualified to debate this topic once you are presented with evidence. You have two choices. Refute it or accept it as evidence.
So good luck with disproving Lucy as a transitional fossil. No creationist, not even any that have scientific training, has come close. You called something "daft" and you cannot refute it. That would make your claims worse than the ones that you called daft.