He is completely wrong. What "preponderance of evidence" means is that her testimony/evidence alone must must make it more than 50% likely that the sexual assault (or other code of ethics violation) happened.
Even if applied fairly (as colleges tend not to do, for example by preventing accused students from introducing exculpatory evidence or giving too much weight to the accusation itself) this standard is too low.
When you have a knife-edge standard like that, there is no middle ground where you say that we cannot say which way the evidence points because the evidence is too close. Either it is more likely than not that sexual assault took place, or that the girl lied (and should, if the process wasn't biased against male students, be expelled for making false accusation). In reality, in most cases there just isn't ' enough evidence to reliably conclude either one of the alternatives.
Think about it scientifically. The Null hypothesis is that no sexual assault took place. The alternative hypothesis is that sexual assault took place. Is it really reasonable to reject the Null hypothesis based on p<0.5?
Yes, he can rebut, and his rebuttal may weaken her case; but if her testimony/evidence alone doesn't meet the "preponderance of evidence" standard he doesn't have to present any defense at all.
Unfortunately colleges are putting very much weight on her say-so. Even if contradicted by actual evidence such as communication between the two (
"I had a great time. Let's do it again" or something to that effect is not exactly what one would write after a sexual assault) after the alleged rape. Composing text messages can also reliably prove that a person was not to drunk to consent at the time. For example in the UGA case the male student was expelled because the college concluded that she was too drunk to consent based solely on people having seen her drink earlier that night. They completely ignored evidence that she walked home after the sex (i.e. she had enough gross motor control to walk unaided) and she wrote text messages (proving she was both coherent and had dexterity and fine motor control to use the phone keyboard). But they made up their mind to expel him and damn evidence and reason! Some of her friends seeing her drink must mean she was too drunk to consent. Somehow. Even though such a standard applied evenly and equitably would make 95% percent of UGA student body both rape victim and rapist, regardless of gender.
And when they conclude that actually consensual sex was non-consensual merely because the girl was drinking, they never say that she also raped the guy if the guy was also drinking. If two drunk people have sex, why is it invariably the guy who gets punished?
And Loren's last claim is beyond ridiculous. Percentages of so-called "false reporting rate" as nothing whatsoever to do with it (except that he just HAD to interject his "all women lie about rape" implication into the conversation)
If you apply the Bayes' theorem the false reporting rate would be one term in the equation.
By the way, there have been numerous cases where the woman lied and people fell over themselves to believe her. UVA student catfished herself and completely made up a story (the guy who supposedly raped her was imaginary and a composite of guys she knew in high school) but the university still suspended the innocent frat for months.
Duke University threw three of their students, the Lacrosse team and its coach under the bus immediately, without investigating anything, based on a false allegation by a woman who wasn't even a student at Duke (she studied, or at least was enrolled, at UNCC).
At Amherst, two drunken students had consensual sex. The guy was expelled, the girl was not even though they did exactly the same thing.
At Vassar there was another expulsion based on a false accusation made a year after the supposed sex. Vassar refused to consider exculpatory evidence and expelled solely based on the girl's accusation.
And UNC a male student was expelled even though the case was so rotten that police actually charged her with making a false report. It still took UNC years to reverse themselves and readmit him.
Those are only some of the stories of universities jumping the gun to believe a lying female, just because it is politically correct to believe that a woman would not lie about rape.
P.S.: Weren't you the one who, in another thread, insisted that the girl might be telling the truth, even though all evidence (such as security camera footage both at the bar and her dorm) showed that she was lying about how drunk she was?