Brains without evolutionary history are inconceivable and functional brains without constant interaction with the world are equally inconceivable. The mind is a natural, that is biological, product of the constant interaction of the embodied brain with the world, a dense nexus of largely circular processes. Perceptions are perceptions because they have meaning and that meaning can't be traced to the head. That is why brain scanning yields information about the causal relations in the brain but will never reveal any meaning. All one may hope to get is syntax and even that is idle hope.
Brain activity is more like a footprint on the beach than like printed letters on the page.
Strictly speaking, even the syntax has to be imposed from the outside as it were. To expect brain scanning to reveal anything about perceptions is like to expect a magnifier to reveal the meaning of a text. Sure, the magnifier would let you see the ragged edges of the printed letters better, but the meaning isn't in the letters. The meaning of a text is not to be found between the covers of the book. I find it fun to design cartoons that capture some of the issues involved.