You are still smoking dope. It was not rejected until the 1950's when they did a (I think) chlorine test. It was then someone started taking a closer look. At that time they discovered there was about 1/2 a million years difference in age of skull and jaw bone.
Nope. They couldn't 100% prove it was fake till then, but they had concluded that it was almost certainly a fake within a year of its being proffered. Only the British Museum was slow to reject it, and that mainly due to national pride since it was "found" in England.
