That is actually incorrect, and science has maintained the position that biological and chemical reactions in our brain do not necessarily reflect subjective mindset. Overwhelmingly so that the same reactions can be created and transferred from one being to another yet not produce the same.
Until such time that Science can explain the exact relationship between subjective mental states and brain states, the nature of the relationship between the conscious mind and the electro-chemical interactions in the body, it cannot claim that we are a product of evolution. The explanation must be exact and the evidence must not be circumstantial.
``Selection for physical reproductive fitness may have resulted in the appearance of organisms that are in fact conscious, and that have the observable variety of different specific kinds of consciousness but there is no physical explanation of why this is so-nor any other kind of explanation that we know of. To make facts of this kind intelligible, a postmaterialist theory would have to offer a unified explanation of how the physical and the mental characteristics of organisms developed together, and it would have to do so not just by adding a clause to the effect that the mental comes along with the physical as a bonus. Explanation, unlike causation, is not just of an event, but of an event under a description. An explanation must show why it was likely that an event of that type occured.``
``The problem is that evolutionary theory is not necessarily a complete and deterministic equation. Saying that some feature of an organism has appeared due to biological evolution is one thing, saying that it was certain or highly probable to appear is another thing. ```
http://blog.brainfacts.org/2013/03/can-science-explain-consciousness/#.VHEdOYvF_7E
The above is the best article I have read on consciousness and evolution in my life.
Its one thing to say that evolution is a process is a fact, however please do not apply it where ever you want and whatever you want to be. Problem is that you guys make evolution itself a religion and defend it no different then the Muslims defend their Allah. Until such time that Science can fully explain consciousness and create it themselves, it should not claim to understand human beings as a product of evolution. Most scientist don`t. They reserve their opinions until more facts come out, and don`t say things like we are a product of chemicals in our brain......