I have little to add to the conversation here or anywhere else with regards to this specific rape investigation as it is being exploited by a whole lot of people for every reason under the sun.
Only thing I have to add to the conversation of rape in general is that it absolutely a disgrace and humiliating that a large percentage of the populace don't even know what rape is or what it means. Shame on the general populace and shame on the much of the media for down playing such a series issue. The conversation of rape can't even begin when people believe that "mutual consent to go home together" constitutes as evidence that rape can then not occur. Makes me sad more than anything when people begin to think that way. Can't be angry...just fucking stomach churning sad that some people are that stupid and I have to share the earth with them.
Now back to my Cosby avatar
The reason you are so upset is because you appear to strawman arguments into the narrow box you are comfortable arguing against and then proceed to do white knight battle against them.
I have yet to see anyone argue that mutual decision to go home proves that a rape "can not" occur. Rather the more nuanced (and therefore apparently difficult to debate) assertion is that a decision to go home, in the absence of any other definitive evidence shows the state of mind of both involved, and goes a long way to establishing that at some point sexual relations were on the table. That does help to boost a later claim of consensual sex, again in the absence of anything to the contrary.
State of mind evidence is not some magic juju that the courts don't know how to deal with. It's used all the time. It's not conclusive, but it is definitely a piece that helps put together a reasonable doubt puzzle.
It works the other way of course as well, if Kane had been seen harassing/hitting on the girl all night with her obviously rebuffing him, it would hurt his later claims that they suddenly decided to have sex. But when you simplify complex issues down to something you can whack away at with your righteous indignation hammer, you really do nothing but perpetuate the type of discussion you claim to be against.