John Aquila: Do you recall the publication or magazine where they acknowledge evolution? Thanks!
No, off the top of my head I do not.
But as I mentioned above, it wouldn't be an explicit "we believe in evolution" statement.
I used to give several public talks on this subject and read everything by the WTBTS that I could get my hands on. It was clear that they understood that most people were confused about the differences between evolution and biogenesis (origins of life).
Many of the society's publications clearly took advantage of this to create false dichotomies.
For example, consider the title of the book, Life- How did it get here? By evolution or by creation?
The very title sets up a false controversy. The real question should be: How did life get here, by direct creation by God or by purely natural means that do not require the existence of any kind of supreme/superior being?
That doesn't exactly roll off of the tongue, but it more precisely frames the real issue: Is there a God or not?
As I recall, the Reasoning book had a section on evolution that had a bit of verbal jiu-jistu by trying to confuse the householder with a question something like: "I find that different people mean different things by the word 'evolution.' What do you mean by it?"
Simply put, evolution means: change over time. That is completely non-controversial and totally indisputable. We all know that the real debate is whether or not there is a God and all that that implies.