How far back...

[Willtor]

This is one I am not too sure about. It is mostly "proved" these days by T2. However, I see much disagreement on the relationship to chimps in the fact that there would appear to be too little time for the added human brain size to occur. I think we might make many more subsatntial discoveries in genetics yet and so will remain skeptical of the current understanding of T2.
And yes, I am aware it is the ancestor of chimps and humans we are talking about - just to save you the time.
SR.

The evolution from the common ancestor of chimps and humans is pretty well documented -- both from the bone and genetic lines of evidence. Consider the skulls that have been uncovered. There is a clear and gradual increase in cranial capacity (not to mention the development of whatever other head/facial features).

 

[philadiddle]

This is one I am not too sure about. It is mostly "proved" these days by T2. However, I see much disagreement on the relationship to chimps in the fact that there would appear to be too little time for the added human brain size to occur. I think we might make many more subsatntial discoveries in genetics yet and so will remain skeptical of the current understanding of T2.
And yes, I am aware it is the ancestor of chimps and humans we are talking about - just to save you the time.
SR.

You'll have to elaborate on your line of reasoning here. You are aware of the transitional fossils, you are aware of the genetic evidence, you are aware that the evolution of the brain is at least possible, but you are going to put all of that evidence up on a shelf out of site and ignore it's conclusion because you don't yet understand how the brain could have evolved within a few hundred thousand years. I don't get it. Wouldn't it make more sense to accept the conclusion of the overwhelming evidence and then work towards filling in the gaps in our knowledge?

 

[sfs]

This is one I am not too sure about. It is mostly "proved" these days by T2.

What is T2? Human/chimp common ancestry is supported by a wide range of genetic evidence. How much of it are you familiar with?

However, I see much disagreement on the relationship to chimps

Not among those in the field.

in the fact that there would appear to be too little time for the added human brain size to occur.

Please present your calculations.

I think we might make many more subsatntial discoveries in genetics yet and so will remain skeptical of the current understanding of T2.

Again, how much do you know about human and chimpanzee genetics?