Juvenissun said:
But, how many these kind of traits are there between ape and human? Are there more than three (A, B, C). So sample#1 has A, sample#2 has A and B, and sample#3 has A, B, and C. And these three samples are transitional between ape and human?
That's actually a really good question.
Humans have many traits which other apes don't have - we walk upright, we have no fur and we have very large brains for our body size. Transitional fossils have some of these traits. The early ones are distinctly more ape-like (with a few human traits) and later ones are distinctly more human-like (with a few ape traits). For example:
Aripithecus Ramidus
Human traits: Partly bipedal; small canines
Ape Traits: Ape-like feet; ape-like hands; fur; heavy brow ridges; sloping forehead
Brain size: Smaller than a chimpanzee (350)
Australopithecus
Human traits: Mostly bipedal; small canines; human-like feet
Ape traits: Ape-like hands; fur; heavy brow ridges; sloping forehead
Brain size: Same as a chimpanzee (400)
Homo Erectus
Human traits: Completely bipedal; small canines; human-like feet; human-like hands; used tools and fire; no fur
Ape traits: Heavy brow ridges; sloping forehead
Brain size: Larger than a chimpanzee but smaller than a human (between 600-1000)
Homo Sapiens
Human traits: Completely bipedal; small canines; highly advanced use of tools; no fur; human-like feet; human-like hands
Ape traits: Some people still have brow ridges (most don't)
Brain size: Very large (1,250 - 1,600)
Keep in might though that evolutionists do not believe there was any 'magic moment' where an ape suddenly became human (although
theistic evolutionists might disagree
).
Juvenissun said:
How about that we need to see trait D in order to call it a human. I don't know what that is, but I can make up (or select) one.
If there is one single trait that makes us human is probably our large brains. I think scientists have identified a few genes which greatly increase brain size - perhaps that is "trait D".
Juvenissun said:
For example, If one courageous anthropologist insisted that australopithicus IS a human, why is it wrong?
Possibly because it has more ape traits than it has human traits - although I should point out evolutionists haven't agreed on when exactly 'apes' became 'human'.