1, to the GP: RAINN says that 1 in 6 women has been the victim of rape. That's different from "will be over the course of their life". That rate is guaranteed to be higher. 1 in 6 in the "have been" category would imply that 2/3rds of the average surveyed woman's rape risk is behind them to reach the 1 in 4 figure, which is not at all an unreasonable assumption.
2. When you want to cite data, don't cite secondary sources. They tell you the name of the Bureau of Justice study, so let's actually read it. We immediately notice first off that annualized rate of rape for non-college students is 8 per 1000, not 6 per 1000, so they chose the lower figure. Being in college actually *reduces* a woman's rate of being raped. But let's just go with the lower figure. A rate of 6 per thousand over... oh, let's just say 50 years... is 1-(1-0.006)^50=26%. Now, we chose the lesser percentage (6 per 1000 instead of 8 per 1000), and the average woman lives a lot longer than 50 years, but we're again assuming a higher rate of rape in the younger years counters this. In no way does the cited data argue against the fact that one in four women will be raped over the course of their lifetime.
3. I don't know what "Ali's study" is or who Ali is, but it's irrelevant given the above. However, I will point out (and shouldn't have to) that it *is* illegal to have sex with someone who is visibly intoxicated to the point that they cannot make a reasonable decision. I'm not going to dig up the laws on all 50 states for you, but just to pick the largest state, here's California's statute. If the person is slurring their speech and can hardly walk, they're not cogent enough to consent to anything. You can't give *any* legal consent in such a situation. You can't sign over your house, you can't transfer ownership of your car, etc. And that's a damned good thing.
Note that this only applies to cases where the person has drank so much that they are visibly impaired to the point that they can no longer make reasonable judgements. As always with such cases, the courts apply a "reasonable person" standard - they're impaired suchly if a "reasonable person" objectively looking at the situation would judge their decision-making abilities as being that impaired. Being "a little tipsy" or "buzzed" does not meet this standard.