You mean we should call rocks conscious?
Factually there is none.
1- No. However, even our own consciousnesses act through rocks/other elements and arrangements thereof. We do quite a bit with silicon, copper, plastic, etc... such as this.
(Interesting verses on the subject....
Mat_3:9 And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham.
Luk_3:8 Bring forth therefore fruits worthy of repentance, and begin not to say within yourselves, We have Abraham to our father: for I say unto you, That God is able of these stones to raise up children unto Abraham.)
2- Technically, that is correct -if you mean that we are not able to travel to the brain, point at the brain -and say... there is the brain....
There is, factually, evidence which does suggest or indicate there is some sort of brain, but there is no factual evidence of the brain itself... its location, etc...