Physicists & philosophy

Deciding to take upon myself to enjoy this summer I've tried to re-read Stephen Hawking's book A brief history of time and yet i'm not even on the 13th page and I feel a strange contempt for his philosophical comments. A surprise to some that a physicist should even be considering these realms. But I believe their jobs interact once in awhile, their fitness as either is in their ability to appreciate the delicacies of the other side.
Take page 13 from Dr. Hawking's book; he describes in a rushed detail an application of Darwin's theories concerning human reasoning. It's a recent enough book, not even 20 years old and yet he fails to recognize the critical comments about it - whether or not human reasoning would "evolve." A point I haven't ever been able to fully argue or decide upon myself, one would think an esteemed Professor would recognize the importance of acknowledging the development of that and other arguments.

Your moral for the day: be mindful of the experts, they might be talking out of their arse.