Michael,
You, probably, haven't gone through the 'Biology' section of my essay and there I have said how 'mind' came in to existence; it is as a result of billions of years of the evolution of Life. It is identified as the over all function of brain and brain,in turn, is composed of living matter in the form of 'neurons' and the brain (now we can call it 'mind') is designed to comprehend its surrounding (i.e., environment) through its cognitive powers.
Mind can know of what happens in its environment only through Bit and there by assessing the situation itself is It. We can have more discussion on it, if you like. I will post my comments on your essay soon.
sreenath