Thanks terry. It seems that not only humans can think. What do you think about the assumption that the aquisition of language is necessary to achieve what is described as meta-cognition? I don't think it is, or actually I think that as quoted it is a flawed definition.

There is a great story about crows from an Asian city (can't remember details and have no facts to back this up!). The crows enjoyed the kernel of a hard shelled nut but they had difficulty cracking the shell. So they were dropping the nuts on a busy intersection in the city and watching as the traffic cracked the shells open, then flying quickly down to pick them up. They then had the sense to take them to the side of the road to eat them, (maybe some sad lessons learned there!). I remember seeing some great footage on TV of the whole thing.

We have come a long way in our knowledge of behaviour since I was taught that humaans were the ony tool-using animals.