> Many, many people find themselves unable to eat the stuff without obvious
problems.

As I pointed out previously, same can be said of fruits and/or nuts. I
believe I have read more complaints on this list regarding these two paleo
food groups than any other.

> an argument that's just as fair on the other side could be made that they
were smart
> enough to know to avoid eating the stuff since it's bad for you.

Humans ate, and still eat, contents of animal stomaches/intestines. Whether
we like it or not. How, pray tell, would they know a stomache filled with
fermented milk would be worse for them than one without?

> intellectual honesty

I started this thread because of that. Intellectual honesty requires no
broad based or all-inclusive assumptions. (Never generalize :)