Re: techniquies in street fights
In princple i would agree with Alex that you deal with a knife the same way you would deal with not having a knife, your approach is exactly the same.
In reality, it is much different, and I agree with Michael's point of view.
Of course your not necessarily "done for" and it is not forgone that you will get cut. But, the chances have just increased exponentially and the dynamic/tactics of a bladed weapon is much more different than the dynamic of a empty hand so of course your going to have to deal with it much differently.
I really can't say anymore about the realities of it that have not already been expressed above. If you think otherwise, well then so be it.