"If a woman is going in and out of consciousness, what sensible person would give any weight to anything they said during a brief moment of consciousness"
If the man was also drunk what makes you think that his thinking was any more sensible, coherent or lucid than hers? And yet he is expected to do the thinking and the rationalising for both of them?
I have been the drunk woman in this scenario, I have found myself in situations I wish I hadn't got into, but in all-but-one of those situations, the man was also drunk and I would not have expected him to be able to judge just how drunk he thought I was or to notice whether I was 'blacking out' or just having a little nap in between times.
I was irresponsible to get so drunk that I wasn't aware of my surroundings, but I was with other stupid drunk people, some of whom were men. That didn't give anyone the right to penetrate me against my will, but if my will at the time was to go for it, even if I didn't remember afterwards, then that should not be called rape.
I'm not some hairy handed trucker, just someone trying to see both sides, but as far as I can see, it is not a man's responsibility to police a woman's sex drive and decide if she really wants sex or not, or to make judgment calls based on what he thinks she wants rather than what she is showing him and telling him that she wants. If no means no then why doesn't yes mean yes?